I really like ear muffs and use them when shooting pistols, but can't when shooting a shotgun as my ear cheekbone ratio plants them on the my comb breaking the seal between ear and muff rendering them useless. If yours barely touch your comb, I would think taping the bottom of the muff ywould keep them from scratching your comb or maybe you can find a pair that doesn't hit your wood, I haven't been able to.
It's been my experience that most muffs don't adjust up high enough to keep them from sorta hanging on my ears. I glue a piece of foam on the underside of the top strap to lift the things to where they don't ride on my ears and they're just fine and don't hit the stock. Generally I've noticed that I can lift the things really high and not have any strange pressure on the ear so I'm guessing that the pad thing would maybe help about anyone.
I remember well my very first ear muffs I used along with those old "sonic valve" ear plugs. Those muffs would bang on the comb quite often and I didn't like that sound at all either! Sometimes they wouldn't bang on the comb and I liked the muffled sound they gave me.
The reason I heard that baffling irritating sound had nothing to do with the muffs themselves but it was something I was doing unawares! MY HEAD WAS MOVING ON MY STOCK! That was causing the irritating noise that bothered me and I blamed it on the muffs! Once I planted my cheekbone on the comb and became one with my shotgun, the problems ceased! I still use them today too, Peltor 7s and I love them!