Yes my grow store will recalibrate if it needs it.I have some of their storage solution, put 3-4 drops in the little hole the probe goes in. Supposed to put drops in once per week. Don't see why your method wouldn't work, as long as it doesn't dry out, I guess.This is a good buy Bubba. I recently bought my second bluelab pen after the first one served me a good 7 years. Just a little tip, I store it in ph'd nutes from my res in a plastic coffee container which i cut the lid to make the pen fit tightly. It has a warning label "if it dries it dies" and the cap holds very little water for longer term storage. If you feel that the probe is slowish, it is ok to use a soft toothbrush and dish soap to clean the probe then recalibrate it.
Bubba