Remove Mod Podge (and Glue) from Paintbrush with Acetone

When it comes to decoupaging or crafting with Mod Podge or white PVA glue, I like to use a paintbrush. I found that getting the paintbrush completely clean afterwards wasn't the easiest thing. But after trying different solvents and solutions, I discovered that the best one for getting out all the Mod Podge or glue is acetone (or nail polish remover).