I tried several suggested fixes I found online, for the grey coated supposed 'none-stick' omelette pan, which appeared perfect, but constantly had food stick to it. Nothing I tried worked, so I have given up on it. That was an 'Hairy Bikers' pan, it didn't survive long.
I already had a couple of larger pans, of a type with a speckeled none-stick finish, and as those had never had a problem with food sticking, I thought to look out for a similar finish on a smaller pan suitable for omelettes - today, I picked up a Salter Megastone none-stick, with which it is suggested to be OK to use metal implements. With a 10 year guarantee.