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It totally depends on the type of stain, the stained material and how far you are willing to go. Here some hints:

Motor oil or grease

Rub with butter or plant oil, then add liquid soap (without water) and rub again, then rub and rinse thoroughly with water, then rub with liquid soap, and then with water again. Plant oil solves motor oil, liquid soap solves plant oil, water makes an emulsion with it so you can wash it off. In hard cases, use organic solvents like acetone, but not on skin.

Colorful plants and fruit juice etc.

When fresh, rinse with copious water. If dried or not removed completely, use bleach.

Paint

On skin: Water and soap and rubbing, no organic solvents, please!

On other surfaces: When fresh, use appropriate thinner for that paint. When dry, give first methylated spirits and then acetone a try. Test first somewhere for compatibility: Acetone dissolves/disfigures many polymers.

Rust

Use combination of ascorbic acid and citric acid and baking soda. Or maybe Coca Cola. Or rust remover, which is phosphoric acid as far as I know.

Limestone deposits, like in a shower

Light cases: Vinegar. Medium cases: Citric acid. Hard cases: Hydrochloric acid. Careful, it's corrosive!

Cement stains

Cement stain remover, as far as I know it's hydrochloric acid.

Clay, soil etc.

Soap

Blood, egg, other protein-containing contaminants

I didn't try this, but a paste made of a crunched dishwasher soap tab plus a bit of warm/hot water (65 °C) should be quite effective. Wear gloves, it's corrosive for skin!

Really, really resistant organic stuff on very, very robust surfaces like glass, stainless steel, porcelain

Like the remainders of a a totally charred gratin after several conventional cleaning cycles

If you are really, really zealous and have access to the necessary chemicals: Piranha solution! One part of 30% hydrogen peroxide solution with three parts of concentrated sulfuric acid. Mix very carefully! It gets hot, explodes in contact with excess organics and eats everything, including your flesh. Hence, the name piranha. But it even dissolves carbon, so it is sometimes the last chance to recover laboratory glassware and the like.

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How do you measure how well a stain remover works?

The effectiveness of a stain remover can be measured by testing it on a variety of stains and fabric types and evaluating the level of stain removal achieved compared to a control. Factors such as time required to remove the stain, ease of application, and any damage to the fabric should also be considered in determining its performance. Conducting controlled experiments and comparing results can help determine the best stain remover for a particular type of stain and fabric.


How can you prove which stain remover works best on white cotton after comparing some stain removers?

To determine which stain remover works best on white cotton, conduct a controlled experiment by applying different stain removers on identical stains on white cotton fabric. Take before and after photos, document the removal process, and assess the stain removal effectiveness objectively, such as by measuring color intensity or spot size. Repeat the process on several stains to ensure consistency and reliability in the results.


What are some of the best laundry stain removers?

The best stain remover depends on the type of stain and the type of material you use. The safest stain remover is water, but if you have a protein stain hot water will make the stain worse. Most people agree that bleach is the strongest stain remover, but unless the garment is white or color-safe bleach will cause a worse stain.


What is the best carpet stain remover?

According to Good Housekeeping, the best carpet stain removers are: Hoover Platinum Collection Instant Bissell OxyPro Weiman Carpet Cleaner RealSimple.com recommends: Resolve Triple Action Spot Carpet Cleaner Carpet stain removers work the best if they are used on the stain as soon as possible. The type of carpet stain remover that works best may also depend on the type of stain you are trying to remove. There are also many home made carpet cleaners which can be used on specific types of stains.


Which stain remover works best on cotton fabric?

Removal of stains is based on the type of stain and the fabric. The best stain removers to try are Oxi Clean, Shout, Spray n Wash, and Zout. Depending on what the stain is, things like white vinegar or baking soda may also get the stain out.

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How do you measure how well a stain remover works?

The effectiveness of a stain remover can be measured by testing it on a variety of stains and fabric types and evaluating the level of stain removal achieved compared to a control. Factors such as time required to remove the stain, ease of application, and any damage to the fabric should also be considered in determining its performance. Conducting controlled experiments and comparing results can help determine the best stain remover for a particular type of stain and fabric.


What is the most effective stain remover?

Tide stain release. It revomes stains that have been on there for years! I love it! It works great!


How can you prove which stain remover works best on white cotton after comparing some stain removers?

To determine which stain remover works best on white cotton, conduct a controlled experiment by applying different stain removers on identical stains on white cotton fabric. Take before and after photos, document the removal process, and assess the stain removal effectiveness objectively, such as by measuring color intensity or spot size. Repeat the process on several stains to ensure consistency and reliability in the results.


How do you order blow window cleaner?

I found that this stain remover works just as good.


What are some of the best laundry stain removers?

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How can you get your ugg boots clean?

Stain Remover, sounds weird but it works i have done this a million times with mine! works great!


What makes a certain stain remover better than the next?

Stain removers work by interacting with the material of the stain and dissolving it. For example, modern enzyme stain removers contain protein enzymes which actually "digest" the stain. You have to find the remover which is designed to act on whatever made your stain to get the best results.


What is the best carpet stain remover?

According to Good Housekeeping, the best carpet stain removers are: Hoover Platinum Collection Instant Bissell OxyPro Weiman Carpet Cleaner RealSimple.com recommends: Resolve Triple Action Spot Carpet Cleaner Carpet stain removers work the best if they are used on the stain as soon as possible. The type of carpet stain remover that works best may also depend on the type of stain you are trying to remove. There are also many home made carpet cleaners which can be used on specific types of stains.


How do you make easy goo?

You use liquid glue and stain remover such as shout and mix the 2 together if the goo sticks to your hand or anything then use more shout or any stain remover that you used It works perfect


Which stain remover works best on cotton fabric?

Removal of stains is based on the type of stain and the fabric. The best stain removers to try are Oxi Clean, Shout, Spray n Wash, and Zout. Depending on what the stain is, things like white vinegar or baking soda may also get the stain out.