I use PAM or a spritz of olive oil when I cook. fat isn't bad for you...too much fat is bad for you. when eating clean, you'll be low on fat, so its ok to use a little bit of olive oil when cooking foods.
omlet, scrambled, poached, hard boiled...its all good.
and its quite alright to eat a couple yolks too...for the same reason...fat is ok, plus half an egg's protein is in the yolk.