Homemade ice cube candles?

Ok here is a question?
I have been using all my old candels and melting them down in an old pot than I have 4 ice cube tray I brought from the dollar store and pour them into the tray I also started to thing that the plug in that you put in the wall is oil so I punch a hole in it and poured it in the hot wax it worked now this may sound funny but I have one of those home spa's with hot wax that I put my hands in after a while you get rid of the wax but do you think I could use that wax to make candles I don't know what to do with the old wax? I hope this doesn't sound to gross sorry if it dose. By the way my hands are the only ones that have been in the hot wax .Thanks for looking
Kim