so, i went by my buddies, where i have my ladies & i noticed that my liquid kool bloom had a skim on the top of it, it looked like it may have been mold. so is my whole bottle ruined now or can i strain what ever it is off & go ahead and use it the liquid? also if i use the same little mixing glass for all my nutes 1 at a time , do i need to rinse the glass between nutes? will the few drops that linger in glass be enuff to mess up the next kind of nute that i measure? maybe kinda lock little bits of my nutes?