i am having a problem with general hydroponics nutrients used the same spoon on all the bottles had to drip a bit back in some of them because i didn't want to feed to much didn't know you weren't supposed to mix them out side water wouldn't say i did but would that cause a problem wiped the spoon off a bit but would the residue be a issue can i still use it or do i have to get new bottles they are not cheap i feel a bit stupid asking but i really don't want to mess up ? any advise will be greatly appreciated its flora duo by the way if that matters with a few of the other things they have to use on the chart