Ive been using colgate toothpaste for almost a month now, and yes overnight , and I usually sleep for 6-8 hours.
After a few days of using it, I saw a mild improvement--reduced the redness and the size of my new pimples. However, I started peeling it off while it was dry, and I believe that was the cause of the scars/red spots, as a replacement of my pimples,
DONT peel it off, trust me. Let it dry and mildly wash it off with noncomogenic soaps. I use Ivory since it doesnt have any chemicals.
Although it does get rid of new grown pimples, it doesnt get rid of scars, thus, try to use Tea Tree Oil.
THE BEST WAY TO GET RID OF ACNE FAST, IS TO SLEEP EARLY, AND AVOID PICKING THEM.
Im a 15 year old teenager, and I usually sleep at 12-1am . From 10pm our faces start to produce more oil as usual.