Rubbing alcohol is the safest to use, but it may not be as effective and you may need to use it a few times before you get the stain off. The higher the percentage, the more effective it will be. Try to get something that is 90% or higher. [8] X Research source Hand sanitizer works great on curved surfaces because it holds its form better and does not drip as much. It will be about as effective as rubbing alcohol. Acetone is the strongest and most effective. It can remove paint and melt certain surfaces, so it is not recommended for painted surfaces and softer plastics. Consider testing in an inconspicuous area first. Simply dampen a cotton ball and press it against the area for a few seconds before wiping it away. If the plastic appears distorted or loses its color, do not use acetone; try rubbing alcohol or hand sanitizer instead.
For very small stains, you will probably need a pea-sized amount of toothpaste and baking soda. For larger stains, you will need up to a teaspoon or tablespoon of each. You will also need something to mix the toothpaste and baking soda in, such as a small bow, dish, or cup.
If there is any oily residue, soak a cotton ball with some rubbing alcohol and wipe it clean.
