hm i never had that problem.. ive installed 3 different ones.. not sure what the difference would be but heres how i installed mine

thorough wash with a netted sponge

waxed using dupont teflon car wax

let car sit in the sun for about 30 minutes

warmed bra in oven for a minute

had a friend help install... holding outside edges laid the front most two parts on the side of the grille and worked my way back.. once that was on, my friend held his hand in the area the edge piece was being pushed on to prevent the bra from bunching under the force of the edge piece