Best use of Andy's nap time

I used to allow myself to rest and take a nap if I wanted during Andy's nap time. A recent comment made me start using his nap to clean more. It was hurtful to hear about my messy house from someone else. I have to say, it sucks not getting that time to relax. The house looks nice, but I am wiped out. So, I will probably just return to taking better care of myself during Andy's naps. I just don't think it's worth it, to not be refreshed for my kids and husband. I will probably just tackle something small, and then rest/relax until Andy wakes up.