I have an old Flip a Card that I have restored and she is a beauty. Everything is working as it should, but I have noticed that after playing another Flip a Card that "all" of my coils seem weak. This includes the pop bumpers, sling shots, and flippers. I have gone through and cleaned all of the switches, checked EOS switches, cleaned and resleeved the coils... What to do next? Is there a fix for this? Looking forward to expert advice.