The following procedures are courtesy of the Carpet and Rug Institute, the trade association representing the major carpet manufacturers.
Act quickly! Delaying may cause the spill to become a permanent stain. Blot liquids with a dry, white absorbent cloth or white paper towels. Gently scrape up semi-solids with a rounded spoon. Break up solids and vacuum.
- Pretest any spot removal solution (for colour transfer to the cloth or damage to the carpet) in an inconspicuous area. If a change occurs, select another solution.
- Apply a small amount of the solution to a white cloth, and work in gently – do not rub – working from the edges of the spill to the center to prevent spreading.
- Allow to remain on the spill a few minutes. Be patient. Blot.
- Continue to use the first agent as long as there is a transfer of the spill to the cloth. Be patient. Complete removal may require repeating the same step several times. Or, you may need to move to the next solution.
- When the spill is completely removed, rinse the area with cold water. Blot with a dry cloth until all moisture is removed.
A dry, absorbent cleaning compound may be used as a substitute to minimise drying time.
A non-flammable spot removal solution, or dry cleaning type solvent, is preferred. Exercise caution when using a solvent, and follow manufacturer instructions. Never pour it directly onto the carpet or allow it to reach the backing, because it can damage the latex that holds the primary and secondary backings together. Solvents are readily available in the cleaning supply section of hardware and home supply stores.
Mix one fourth (1/4) of a teaspoon of a liquid dishwashing detergent per one (1) cup of lukewarm water. NEVER USE A STRONGER CONCENTRATION! Thorough rinsing is necessary to remove detergent residues that may cause rapid soiling. It may be necessary to rinse with warm water several times to completely remove residues (see Residue Precautions). Care should be used in selecting a detergent. Never use a laundry detergent of any type, because these may contain optical brighteners (fluorescent dyes) that dye the fibre. Do not select an automatic dishwashing detergent because many contain bleaching agents that destroy dyes and some fibres.
Mix one (1) cup of white vinegar per two (2) cups of water. White vinegar is a 5% acetic acid solution. It is used most often to lower the alkalinity caused by detergent solutions or alkaline spills.
Lukewarm tap water should be used in most cases to rinse the cleaning solutions from the fibre. Failure to completely rinse the solutions from the fibre may cause accelerated soiling.
Mix one (1) tablespoon of household ammonia per cup of water. Please note: be aware that ammonia, if used improperly, can cause a colour change. Be sure to test a hidden area.
Call a Professional
Professional cleaners have the ability, and the equipment, to use more aggressive cleaning solutions to remove stubborn spills. Always consider consulting a professional cleaner regarding any spot removal question.
Many spot removal solutions leave residues in the carpet that may attract soil. Thoroughly rinse the area several times with lukewarm tap water. A mist-type sprayer is recommended to prevent over-wetting. Blot with paper towels and pat dry after each rinse. Several rinses are often necessary to thoroughly remove residues. Never use any of the solutions in concentrations stronger than those recommended.
Note #1: Dry solvents can be relatively safe (such as using isopropyl alcohol to remove ink), to being likely to do some damage to carpet construction if not used very carefully (naphtha or citrus solvents).
Note #2: Wool carpets are more sensitive to alkaline spots and spots removal agents than synthetic carpets. If you use an alkaline product, it would be beneficial to rinse with the vinegar solution before rinsing again with water.
For particular spot removal recommendations, follow this link to the Carpet and Rug Institute’s spot removal guide.