I use a piece of foam and foam dust to remove residue wax. Just a little heat to soften the glue on the old tail pad, but take care. Wax and grease remover for paint prep is good to completely clean wax
I use an old credit card or CVS card or something. Putting it in the sun makes it softer. I actually keep mine in the shade because wax builds up on the side not doing the scraping and as you pass the card, some gets redistributed on the board. Plus I hate when it gets all goopy on my hands. I was wondering about the deck pad myself though, I got one that's raised under my arch and I'm not really diggin' it. I have gotten used to it but for a while I felt I was loosing touch with the board.