When I first started making candles I remember reading on a message board that it was wise not to give specific instruction on how long to burn a candle. Reason was because if a problem occured the customer could always say "Well you told me I had to burn it for x amount of time." A tester told me that my wicks kept drowning. I couldn't figure out why, they were all from the same company and other candles made with those wicks were fine. Same wax used as always. Then I asked her when, where, and for how long she burned the candle. She told me that she burns candles for short periods of time such as when she is getting dress for work or maybe at dinner... So I am assuming the candle is never getting a full melt pool. Just when the meltpool starts to develop she is blowing it out which means the wax is only melting down the center. Do I give her specifics suggestions on how long to burn the candle? What concerns me is that if this is someone that normally only uses candles for a short period of time and I tell her she needs to burn it longer, she may forget to extinguish the candle all together. Such as burning at dinner and then not putting it out because I told her it needs to burn longer and then she goes to bed with a lit candle. I think an electric tart warmer might be a better solution here but in general do you guys tell customers how long to burn or not to burn your candles?