I was finding that after a while into racing I was pulling the foam sleeve onn the steering wheel of the transmitter, and it was getting worst, so like the wheels on the cay I used the wheel double sided tape, and the problem went away.
I would not use any really good double sided tape, because you might find it to tacky, where the wheel tape does give you a chance to adjust a little.
But remember once the foam has been put onto the double sided tape to give it a press down all he way around.