I use them for two pairs of molded earplugs. One for loud music and everyday use, with filters, and the other pair for sleeping, without filter.
The black brush has a tiny metal clip that is very useful for removing the filter without harming the silicone of the earplugs,
The product smells good, and manages to get rid of the sweat and cerumen very effectively. It does not prevent the discoloration, though, but that's something that I can cope with.
The mirofiber cloth is also a big plus, to remove the excess of product without adding bits that could end up in the ear.
All in all, this is a VERY effective and cost efficient for me. I have it for many months and still have half of one of the canisters worth of cleaning.