Maybe the stuff you're using had a different density to mine, but paraffin wax fucking sucks, it doesn't harden again properly and turns into a messy paste once it has been melted.
I've got no idea what it is, but I got a box of really hard wax that a tech friend gave me so I just use that for dry slope. Pretty sure we've got a couple boxes of Data snow wax up in our tech room at the uni as well.