I just got my first candle warmer and I dont know how to use it.

Should I burn the 3 wick candle until that its hard to lit then use candle warmer afterwards?

How about the candles itself, what's the cycle of use, should I use warmer for 3 days then burn the candle to melt of the wax then warm it again etc?

How about the wax when there is no fragrance? like for a whole candle I started in warmer then half of it still not melted and most likely have scent underneath, should I empty out the top wax then warm it again for the fragrance to come out?

how many hours should I turn the warmer on? 3 or 4hrs?

Any tips, advice and help is appreciated.

Thanks