I have been doing a lot of testing while slamming my pool. Now I have a tacky hazy residue on my chlorine cylinder and my blue spoons are black(bowl area). I find this weird since I am very careful to rinse before and after every test.
I would like to clean the chlorine cylinder and spoons. I fear that the build up may start effecting the results slightly, if it continues. Simple water and paper towels do not work, it is too tacky.