What products are brush soap / conditioner for paint brushes? I haven't been able to find an answer.
On the minipainting subreddit I've seen mention that you shouldn't hang your brushes upside down to keep their life because capillary action resists gravity, but that proper brush soap / conditioner is all you need, however said posts just say 'brush soap / conditioner' and don't actually say what that is in practical buyable terms.
What is it and where do I get some? I do have a jar of this brush cleaner and preserver that I use, is this both 'brush soap / conditioner' or is it something else?