I have these kits I only used a couple times for sale, good condition. I'll sell em both for $25.
Saltwater master kit expires 06/2015
Reef master kit expires 08/2018
I have tried water and actually got it shampoo washed at a car wash but it just came back after drying. These are old stains I'm talking about.
Maybe they just did a bad job, I'll try shampoo washing myself and hopefully it'll work.