I'm not sure. Usually clumping is a sign that the paint is drying out. If it's clumpy in the little tubs there's likely an issues with the paint bottles not sealing and letting the paint dry out. If they paint on fine but just aren't running down the glass with the alcohol, maybe adjust the nozzle on your spray bottle, too light of a mist won't send them outwards into the patterns. --Sorry, I don't have a definite answer but I hope that helps.
I love your technique ! Did you put a sealer on them so they don’t wash off? Are they soap/warm water safe or dishwasher safe?
My paint gets clumpy and doesn't run down the glass like yours. What an I doing wrong?
I'm not sure. Usually clumping is a sign that the paint is drying out. If it's clumpy in the little tubs there's likely an issues with the paint bottles not sealing and letting the paint dry out. If they paint on fine but just aren't running down the glass with the alcohol, maybe adjust the nozzle on your spray bottle, too light of a mist won't send them outwards into the patterns. --Sorry, I don't have a definite answer but I hope that helps.