Best I can recall I used WD-40 & just got one edge started then inserted a small screwdriver & worked it around the sides ,used like one would use a shoe horn. Piece of cake. Bought mine from the parts place in Orange ,Ca. I talked to C&G & I asked why theirs' was so much higher priced than the other places & the person on the other end of the line said it was because theirs' was so much heavier material. Sure gald I passed on that. The one I bought works & fit just fine & was pliable.