I melted my wax two different ways. I had an almost full jar candle to melt down. For some reason the wick would never stay lit. I just plopped the whole jar in a pot of hot water and let it completely melt.
I had the water heated only to about medium high heat, I only heated it this hot because I didn't want the glass to break and it got the job done. Once all the wax was melted I poured it into an empty jar with a new wick.
These are the wicks I used, they were 3 1/2 inches long and can be purchased at any craft store. The jars were just ones I had on hand, empty honey jars.
The second way I had to melt wax was like this....
Happy candle making!