after every use i squirt it with water to get any nutez off and in my cap theres a spot with a little sponge in it and i put a little of my storage solution liquid on the sponge and when u put the cap on the probe it sits down on the sponge, there shouldnt be anything else i have to do, i got a cheap $35 millawalkie ph meter that i had for 5 years and it still works, as a matter of fact its been saveing my ass, and i dont even store it in solution and it stills works, i just got an email from hanna wanting my model number you would think they could use my name to pull my info up meaning i had sent it back once already, 2year worth of use and this will be the 4th probe something ant right i think they should just send me a new one, but they wont the will just send me a new probe and it will break again thats the kind of luck i got