5 days now, no build up. I woke up this morning checked my lips and they r fine. From yesterday i started to use vitamin C drops on my lips. I did this before..... to prevent swelling i'm only using 1 drop of vitamin C per day. To absorb the liquid melatonin the best i can, i use shea butter. I've read the lips heal best in a moist environment. I've had this long enough to know what is going on. It normally takes me 2 days for my lips to peel off, thats how fast the skin grew. I'm not going to aggravate anything and i'll be patient. i'll keep updating.