I notice my bottle is already evaporated down to one ounce already, and I've only opened the bottle a few times. The bottle is used for less than 10 seconds each time to apply this nail cleaner to lint free wipe, and then immediately closed. This product is great to dehydrate nail to prep for polish, but this is not a good bang for buck since it is hard to counter evaporation. I also don't live in a humid or subtropical climate. Still a CND fan, otherwise, though