Cigar Oasis cartridge question
I have a Cigar Oasis that has the water cartridge. Actually have two of the cartridges. The inside is that crappy green foam and I noticed a little mold starting and that is concerning. I wiped them out and seemed to have removed the visable mold. I've heard of guys removing the foam and using kitty liter or gel to replace it. Does anyone know how to do this or what the best replacement would be? There are two tiny holes to pour water in. Not sure if the cartridge comes apart or if I'll destroy it trying to take it apart. Want to fix this asap since I'm looking and rebuilding my collection this year. Thanks guys.