Yeah you never want to add moisture to hash as hash should never be moist or wet, it is resiny or even oily, but there is a major difference between oily and moist when it comes to hash.
When Hick said to heat it he was not talking about buffing it before you smoke it, he is talking about repressing it. You press pollem by heating it gentally and applying even pressure and then letting it cool.
If it will not press again, then i would take Hippy's advice and make some ISO oil or BHO, or maybe even some cannabutter, mmmm nothing beats cooking with cannabutter