Stella, when I temper I just melt the wax in a double boiler to 185* stirring intermittently, then I remove pour pot and place on a cutting board on counter and let cool till hardened (4 to 6 hours at least) then I remelt in double boiler to 185*-remove pot-add fo at 160* stir for 2 minutes then intermittently till pour temp...140, 130, 120, and now 110*. When I do add CO (1/2 tsp p 12oz) its done as soon as I put wax into pot before melting (during the 1st time when I temper it). I don't prewarm the fo..I wait to add it when wax cools to 160*-so far I have no complaints as far as ht goes :smiley2: