The dozen or so threads that I read didn't tell me, so here goes again. The MERV is pulled apart ready to dye with RIT dye, but a couple of questions:
How clean do the parts have to be? Will the dye soak through a little bit of dirt or grease here and there, or do the parts have to be spotless?
What do you clean the parts with? Special cleaner or just dishwashing type detergent?
Can the parts touch the side of the container, or will that leave marks on the part. Also, can you pick them out and put them somewhere to dry without affecting the parts surface?