I have the same problem with my Steeda shift knob.. But what I do is when it gets HOT in the summer, I just put a baseball hat or a rag over it. That'll keep it from getting AS hot, but then you still need to get something esle to grab onto it with in these dang Arkansas Summers
I learned my lesson the hard way in the summer. I put the knob on and let it sit outside in the hot heat for about 3-4 hrs. Came out, drove it around and didn't pay attention.. Then I felt something burning the crap outta me and I had the GT logo branded into my palm
Just keep something in the car that you can put over it and will allow you to shift without getting in the way and you'll be good to go.