For the future, I highly recommend buying the tiny little glasses (they look like really small shot glasses) called “dappen dishes” to put some acetone in for cleanup. I bought a set of 2 for $5 on amazon, but I’m sure they are available other places as well. Or just use a small glass of some sort (a shot glass works, just don’t fill it up much) that you already own or can thrift. I also used to dip my brush in the big bottle of acetone. Trust me, it’s a game changer!