Reddit mentions of Simpli-Magic 79078 Cotton Washcloths (Pack of 24), Size: 12” x 12”

Not medical field, but I've worked with needs like this before.

The simple human can has an interior plastic liner that should prevent the plastic bag from sinking. It's not as tedious as it sounds, but when the tag is full you remove the entire liner before removing the bag of dirties, put in the clean bag, pull it taught and shove the rest of the plastic at the top through a little hole and that keeps it from falling until you're ready to remove the bag. Plastic cans won't help with that issue unfortunately.

Reusable wipes are a great idea for your situation. I used the ubbi pul liners in a 6.6 gallon sterilite step can when I cloth diapered my daughter. They say 7 gal, but it's a good tight fit on that step can and it will prevent it from falling into the can. Wash the liner with the cloths each cycle, and having a 2 pack means you always have one clean. You might be able to get away with washing the wipes 1-2x weekly depending on the specific situation, so stock up on wipe cloths based on the projected need between washings.

Ubbi Twin Pack Cloth Diaper Pail Liner, Washable and Reusable, Eco-Friendly, Water and Odor Resistant, Drawstring Closure and Door Knob Hanger, 7-Gallon, White
https://www.amazon.com/dp/B00M6B9IQ8/ref=cm_sw_r_cp_apa_i_x4AEDbW4BFPV9


STERILITE 10949004 Step Can, Black, 6.6 Gallon (fyi that price is currently outrageous, but you can find these at Target, Kmart, dollar general, Walmart, etc)
https://www.amazon.com/dp/B00COYBB3K/ref=cm_sw_r_cp_apa_i_ubBEDb1ZY29DD


I've used these wipes for babies

OsoCozy Flannel Baby Wipes - Reusable And Washable - 15 Pack (Unbleached) https://www.amazon.com/dp/B000138GNY/ref=cm_sw_r_cp_apa_i_.dBEDbJJGMRYP

But I think for a mostly grown man, you could get something thicker like cheap cloth napkins, or kitchen hand towels, or those bundles of washcloths at any big box like this:

Simpli-Magic 79078 Cotton Washcloths (Pack of 24), Size: 12" x 12"
https://www.amazon.com/dp/B0794SLW55/ref=cm_sw_r_cp_apa_i_VqBEDbWCH8GVM

Fyi, buy the wipes in a single color that is NOTHING like your other linens, if you plan on keeping this stuff fully separated and want to ensure there isn't a potential cross contamination or stains on your nicer linens.

You can search for wash routine recommendations basically on any cloth diapering forum these days, but it usually goes something like this:

Only white vinegar in a soak and rinse cycle, then wash with a cloth diaper safe detergent (I've used Charlie's Soap for all our laundry for over 12 years but there are other brands that people swear by so check them out) with an oxygen booster (oxy clean) to disinfect and whiten. Dry as normal.

If you encounter barnyard smells in clean laundry or if he ever develops a fungal infection, bleach it all in hot water and dry it in the sun and you will be good to go. Otherwise, bleaching is overkill and will tear the linens apart in no time.

And last, I hope you recover fully from your surgery. Take care!