Dh bought me a 7 qt Kitchenaid stand mixer in December. I checked the beater-to-bowl clearance and it seemed fine, however, I was whipping up egg whites the other night (that just would NOT whip up so my mixer was going for a LOOONG time) and I noticed after cleaning the bowl that I had distinct scratch marks from the whip at the bottom of the bowl (and they were not there before). I whipped up egg whites just the other day without an issue, but my egg whites whipped up much faster so the mixer was not on as long.
I carefully checked the clearance again, and it does NOT touch the bottom of the bowl. I can't figure out what's going on. I called Kitchenaid and they told me to put a dime at the bottom of the bowl and if the mixer can move it around, it's at the right setting. Mine doesn't even touch the dime (more room under the whip), so I'm even more perplexed as to why this happened since my beaters seem to have more than enough clearance.
A friend of mine suggested that perhaps I didn't click in the bowl properly for that particular batch of egg whites, hence scratching the bowl.
I'm at a loss and I'm a little nervous using my machine again since I don't want to make matters worse.