Stick a filter on the pump intake to catch the solid bits and now you’ve got an IPA cleaner! Paint strainer on the end of the line might also work.
I empathize with you. I wrapped my Form Wash in a clear plastic bag and twist the end closed when it’s not in use.
It may not be scientific, but I know it has some effect - the label on the front of my unit used to be held on with scotch tape, but when the bag was closed for several weeks the IPA vapors actually ate away at the tacky adhesive in the tape and it peeled off.
Starting today I think I’ll try just putting saran wrap over the bucket opening:
