lights continue to flicker now what????

i cleaned my multifuction switch like was discribed on a previous post. but had no luck. my parking lights continue to flicker periodically. and my driving lights do the same if i leave the switch on for driving lights. this is really driving me nuts!!! every time i go somewhere i have to lift the back seat and disconnect the battery. i real pain in the ass. any other suggestions??? i hate like hell to go to dealer and blow 500 or 600 dollars on my damn lights flickering. help guys!!!!!!!!