Personally i'd wait atleast up to 4 hours to let the bronzer set in. I have taken a shower an hour after using a lotion with a bronzer and it completely washed off.
Depends on if you used a lotion or not. Most lotions have DHS in it, which is like a tinted moisturizer. If you used a lotion you should wait 4 hours so the DHS has had time to completely soak into...
the ones ive used in the pass dont even last long at all but i found this new tanning lotion that just came out i was a lil skeptical at first because it was just like one of those ads you know but i...