I bought the brushes thinking i could use them with acrylics but just learned that you’re apparantly not supposed to. I only used acrylics with fan brush and the 2 inch brush and washed them with soap and water after. However, the fan brush is now slightly stained but the 2 inch brush seems to be fine. Is there some way I can clean/repair the fan brush… I’ve hear vinegar might do the trick…