So I purchased this Tengchang 1500w low lying fog machine as it was reviewed as being one of the best on the market, but when I got it there was no instruction manual. I contacted the seller but there appears to be a language barrier. So here are my questions, do I unscrew the back panel to put in the ice to cool the fog? If so, how do I empty the melted water afterward without damaging the machine? Can I use dry ice instead of ice cubes so there isn’t as much of a mess?Thanks for your help.