When I worked in food service I used to half clean things and use the five second rule on anything dropped, and I had plenty of time to slack off and my manager always gave me glowing reviews. There were a few who may have said comments to me but, I would come back by pointing out how their stress levels were disproportionate to the work we were doing which was enough to convince or disarm 'em.

And ten minutes overtime? You're paid for that right? More money!