wet super cleaning

I put a couple of wet supers out for the bees to clean, and I noticed there was a lot of foundation that got chewed up. Is this typical for the honey bees or native bumble/carpenter bees to chew up the wax? I was worried they were going to chew up all the comb down to the foundation. Good...

How do you get the bees to clean up wet supers on the hive without recapping residual honey or refilling with nectar? Do I put them above inner cover? I was amazed at how fast they cleaned and recapped residual honey with the 1st wet super I put back on in Aug. Or should I just set the wet...