Provide advice on how to accomplish the following goal. Give ONLY the advice, no other words or explanation.
For example:

Answer: <advice, as short as possible; a single sentence!>.

Goal: How to soften a hardened paintbrush to paint with?
Place the paintbrush in a baking pan and heat some vinegar on the stove, then pour the vinegar over the paintbrush and let it sit for 10 minutes before combing away the paint with some wire
Soak the brush in warm water and gentle soap, then let it dry. Repeat if necessary.