I am changing my valve cover gasket (OEM Gasket), but the darn thing will not stay in place, every time I try to put the cover back on the gasket falls out, it is too loose. I am putting the long edge into the top of the valve cover so the flatter section would rest against the matting surface. Seems like an easy operation, but not this one....any thoughts? Should I use a little dab of FIPG on the corners/around the edges of the valve cover to keep it in place? What am I doing wrong?