[Q]: Which of the following solutions is better for the following goal:
How can I get rid of old stains in a ceiling?

[A]: Try spraying a mix of 10% bleach to water on them and wait 24 hours and more often than not, those unsightly brown spots will have disappeared, this will clear up most stains on flat or popcorn ceilings, just be sure to protect your eyes and anything close by that could get bleach on it.

[Q]: Which of the following solutions is better for the following goal:
To clean a mousepad

[A]: Fill a sink with warm water and a squirt of hand soap. Toss the mousepad in. Use a sponge to rub the mousepad surface lightly, applying a bit more pressure if the stains are more stubborn. Rinse the mousepad nicely, making sure there's no soap left, and pat the mousepad dry with a dish towel.

[Q]: Which of the following solutions is better for the following goal:
How can you make the paint on your bowling ball that you are making into a Garden Sphere last longer?

[A]: You can make your paint job last longer by coating the paint with two or three layers of an outdoor polyurethane sealant.

[Q]: Which of the following solutions is better for the following goal:
how to de ice a sidwalk without salt

[A]:
mix a teaspoon of Dawn, tablespon of rubbing alcohol and hot water. pour over walk.