Before you answered I started with two drops (wimp!). it was fine! Was afraid with all the redness it would hurt like the dickens.
Then a little later went back in for more -- 3 this time. Still not too bad. I tried to warm up the glass (to warm up the water) -- but i think the cool water bothered me more than the drops!
Okay i'll shoot for EEE (enough-enough-ENOUGH). Five drops this evening.
(i'm going ahead & doing both eyes... just in case the infection tries to hop across my nose. ha.)