After more than 55 years in the carpet cleaning business, one thing I have learned about carpet stain removal is that there is no single cleaner or procedure that will remove every stain.
When I am called to look at a stain, the first thing I try to do is identify what caused it. Sometimes that is easy. Other times, the homeowner has no idea what the stain is or how long it has been there.
That is important because before you can decide how to remove a stain, you first need to have some idea of what you are trying to remove.
It Starts With Identifying the Stain
Many stains are caused by spills, so that is often where I begin.
If I believe the stain came from a liquid spill, I might consider common possibilities such as coffee, tea, soft drinks, milk, or another beverage. But even stains that appear similar may require different treatment.
I also need to consider the carpet itself. A cleaning product that may be perfectly safe on one fiber could cause problems on another. Wool, nylon, polyester, and other fibers can all react differently to cleaning agents.
That is why professional stain removal is not simply a matter of finding the strongest cleaner available.
Start With the Safest Approach
For a typical spill, I will often begin with extraction using a hand tool. A smaller hand tool gives me much better control over the specific area and can often provide excellent suction directly where the staining substance is located.
I usually prefer to start with a basic cleaning solution that is appropriate for the particular carpet fiber involved. The goal is to begin conservatively and see how the stain responds.
Sometimes it is best to apply the solution and allow it to remain wet for several minutes. This gives the cleaning agent time to begin breaking down the staining substance.
After a few minutes, I rinse and extract the area again.
If that removes most of the stain, I may then move to a stronger prespray that is still safe for that particular fiber. Again, I give the product a little dwell time so it can do its job.
At that point, gentle agitation may help loosen material that is still attached to the fibers. Professionals often use a tamping brush for this purpose. The goal is not to aggressively scrub the carpet. Aggressive rubbing can distort or damage the face fibers.
Sometimes a damp cloth can be used carefully for gentle agitation, moving slowly in one direction and then reversing direction.
Afterward, the area should be thoroughly rinsed.
Why Thorough Rinsing Is So Important
Cleaning a stain is only part of the job. You also want to remove as much of the cleaning solution as possible when you are finished.
If too much cleaning residue remains behind, it can sometimes leave the area sticky and cause the carpet to resoil more quickly.
After a stain has been treated, I often like to use an approved textile rinse to help remove any remaining residue from the cleaning products used during the process.
The cleaner that removes the stain is important. But removing the cleaner afterward can be just as important.
Sometimes the Stain Isn’t Really Gone
One of the reasons stains sometimes appear to return after cleaning is something called wicking.
A stain may look completely gone immediately after cleaning. But if some of the staining substance remains deeper in the carpet, it can move upward as the carpet dries.
The tips of the carpet fibers often dry first. Moisture deeper in the carpet can move upward through capillary action, carrying some of the remaining staining substance with it. The stain can then reappear on the surface.
That is why I sometimes recommend placing clean white paper towels over the area after cleaning.
Use several layers of plain white paper towels with no colored printing or designs. Place a moisture barrier, such as plastic wrap or aluminum foil, over the towels. Then place something reasonably heavy on top to hold the towels firmly against the carpet.
Leave everything in place for about 48 hours.
The pressure helps encourage any remaining moisture and staining material to wick into the paper towels rather than back onto the visible surface of the carpet.
And one important point: don’t keep lifting the towels to check underneath. Let the process work.
You may be surprised by what transfers into the towels even when the carpet initially appeared clean.
Blood Is a Completely Different Type of Stain
Now let’s say the stain was not caused by a beverage spill.
Blood requires a different approach.
One clue is the color. Blood may appear red when fresh or brownish after it has dried. A small amount of hydrogen peroxide may bubble or fizz when applied to blood, which can help identify what you are dealing with.
With blood, cold water is important. Hot water can cause problems by setting the protein material in the stain.
The treatment may involve applying cold water, allowing some dwell time, and then blotting or extracting the area. This process may need to be repeated several times.
And here’s something homeowners should know: just because the stain appears to be gone while it is wet does not necessarily mean it is completely gone.
Once the carpet dries, the stain may reappear. Sometimes it may even appear larger, although lighter in color.
That doesn’t necessarily mean the cleaning failed. It may simply mean that additional staining material remained deeper in the fibers and has wicked toward the surface during drying.
The same cold-water treatment can then be repeated.
A dried blood stain can be difficult—even for a professional—to remove completely in one attempt. An appropriate enzyme cleaner may also help break down the remaining protein material.
The key is understanding what you are dealing with before choosing the treatment.
Some Stains Are Solid or Sticky
Not every carpet stain is a liquid.
Tree sap is a good example. Someone may track it into the house without realizing it.
Tree sap can often respond to carefully repeated applications of an appropriate cleaner and warm or heated cleaning solution. But it takes patience. Each treatment may gradually remove another layer of the sticky material.
This isn’t always a one-and-done process.
A stain may require several applications and several minutes of careful work before it is completely removed.
Tar Requires an Entirely Different Approach
A black substance on carpet may be something like tar, which is a petroleum-based material.
Water-based cleaning solutions may do very little to remove it. Petroleum-based staining substances often require an entirely different type of treatment.
This is one area where I strongly recommend homeowners not experiment with whatever solvent happens to be available in the garage or under the sink.
The wrong product can spread the stain, affect carpet dyes, damage fibers, or create additional problems in the backing of the carpet.
The important lesson is simple:
Before you try to remove a stain, try to identify what the stain actually is.
Knowing the cause of the stain often determines what type of cleaning chemistry and procedure should be used.
A Good Example: Nail Polish
Nail polish is another stain I have been called to remove many times.
If nail polish has just spilled, my advice is simple:
Blot, blot, and blot again.
Try to absorb as much of the material as possible without rubbing it into the carpet or spreading it into a larger area.
But let’s say the nail polish has already dried. Maybe it happened yesterday. Maybe it happened several days ago.
At that point, there is usually no reason to panic.
Call someone who has real experience with stain removal before you start experimenting with products.
The reason is that many people immediately think, “I’ll just use nail polish remover.”
Sometimes that may work. But knowing that a product can dissolve nail polish is not the same thing as knowing how to safely remove the dissolved material from a carpet.
For nail polish, I have used a professional spotting product commonly referred to as POG, which is designed for certain paint, oil, and grease-type staining substances.
The procedure requires patience.
I apply a controlled amount to a clean cloth and carefully blot the stain. I may go through 10 or 15 clean white cotton cloths while slowly transferring the nail polish out of the carpet.
The surrounding area also has to be considered because you don’t want dissolved color spreading into adjacent fibers.
A nail polish stain may take 20 or 30 minutes of slow, careful blotting.
And this is extremely important:
Once you begin dissolving and removing certain types of colored stains, you don’t want to stop halfway through the process.
Many solvents evaporate quickly. If some of the color remains behind when the solvent dries, that remaining color can be absorbed more deeply into the carpet fibers and may become extremely difficult—or impossible—to remove later.
Over the years, I have been able to completely remove every nail polish stain I have been asked to handle, including one situation where an entire bottle of black nail polish was spilled on a white wool carpet.
That doesn’t mean nail polish removal is always easy.
It means that understanding the stain, the fiber, the cleaning chemistry, and the correct procedure can make an enormous difference.
Don’t Rush Into Using Something You Don’t Understand
If a spill just happened, your first priority is usually to blot and absorb as much of the material as possible without rubbing it deeper into the carpet.
But once a stain has dried, there often isn’t an emergency.
Take the time to get good advice before applying several different household products.
One of the biggest problems I see is when someone has tried one cleaner, then another, then another. By the time I arrive, I may not just be dealing with the original stain. I may also be dealing with cleaning residues, dye damage, or chemical reactions caused by products that should never have been mixed.
The Bottom Line
After more than 55 years of cleaning carpets, I can tell you that stain removal is rarely as simple as finding one product that works on everything.
Coffee is different from blood. Blood is different from tree sap. Tree sap is different from tar. Nail polish is different from all of them.
Before trying to remove a stain, ask yourself:
- What caused it?
- What type of carpet fiber am I dealing with?
- Is the staining material on the surface or deeper in the carpet?
- Could the stain spread if I use the wrong product?
- Is this something I really understand well enough to attempt myself?
Sometimes the best thing you can do is absolutely nothing—other than blotting up a fresh spill—until you have spoken with someone who has the experience to deal with that particular type of stain.
Don’t rush into using something you don’t understand. A stain that might have been removable can sometimes become permanent because the wrong product or procedure was used.
Have a Carpet or Upholstery Question?
After more than 55 years in the carpet and upholstery cleaning business, I’ve seen just about every type of cleaning problem imaginable.
If you have a question about carpet, upholstery, area rugs, or a stain you are dealing with, contact Alec’s Carpet & Upholstery Cleaning LLC.
Sometimes, the best advice is knowing what not to do first.
Need Help With a Difficult Carpet Stain?
If you have a stain you’re unsure how to handle, don’t experiment with products that could make the problem worse. I’m always happy to offer advice and help you determine the best way to proceed.
If you need professional help with a carpet, upholstery, or area rug cleaning problem, call my office at 781-871-1415 or contact us and I’ll be happy to help.