We like to give Hydro-Stars a minimum of six hours to do their thing. There’s also no harm in letting it chill for a few hours longer, but we wouldn’t wear the same star for more than ten. Wearing it for 6-8 hours on clean, dry skin is the best way to go. Our stars don’t contain any latex or potentially irritating ingredients, but if you do start to experience any form of irritation, remove yours immediately.