Hello, does any one have any tips on pulling out stuck injector copper washers? I had 2 injectors stuck, had to slide hammer them out but now the copper washers are stuck in the bore. I've made a little hook out of a coat hanger to try to lift it up but it is moving. Also does any one have suggestions for cleaning the injector bore, the shop manual does not show a brush, the 3.5 gtdi brush is close but not quite long enough.