I have been using Restasis for 2 weeks and have the continuous burning after each use. As noted this drug is very expensive and it seems wasteful to throw out what is left after the application. I counted 11 more drops in the vial after one use in each eye. I would think with care it would be possible to use more times, keeping the unused portion in the same container as the unused ones. Someone noted keeping it in the refrigerator but the case says to store between 59-77 degrees F. Is this a potential problem? met