@chrismessina Cleans the cache of the quick look. I don't exactly know why the problem happens in the first place. I think it may be happening because of full memory, full cache. There may be an interrupt of that cache cleaning cycle when we put the machine on sleep. Because it happens more when there is a lot of heavy background processes(multiple developing environments, youtube, a lot of tabs) and you wake the computer back from sleep after long time. But this is just an assumption.
Quick Look Fix for Mac