Well place a second layer (to double the coverage) Because the Heal does make the glue more slippery and loose so itll peel off!... Taping to say add 2" of tape off the pad, then place a second piece over that Tape to make 4" (That way its not so effected by the heat as its not on heat tape) But offers more tape coverage!!
I never had the issue bcz it was laid on a desk for me, But if its floating a little just add more tape.