The other obvious way is to decrease the pressure. Even on cold days, water or ice will evaporate if the air is dry, since the partial pressure of the water is low.
I am new to XPS Data analysis, and I have a .sle file that I got out of XPS Machine Software, and I am using CasaXPS to analyse the data. This software takes only .vms files. I want to convert the .sle to a .vms file for analysis. How or where can I do this? Any help on this will be deeply appreciated.