Rickyp, I used the Lyman Moly lube for quite a while because it supposedly didn't need the heater.  I eventually bought the heater, and Wow, what a difference!  Works great, especially if you are working in a cool area, like an unheated basement.  By the way, I switched to LBT Blue Soft, and am thinking of getting a second sizer so I can keep the Lyman Moly in it as it seems better in a few of my applications.  It's good stuff!  Hope this helps.