This isn't a caregiving question per se, but I'm having to clean out the apartment of a man that was a hoarder. My 91 year old dad is the landlord (I help him take care of my mother). The poor man was sick and he left an absolutely nasty bathroom. The toilet wasn't working properly but he didn't inform my dad. Used toilet paper on the floor... you can imagine the rest. When my dad didn't receive his rent, he went to check on him because he was always punctual and that's when he found out about the toilet, and the mess. He lived alone and only has one sister that placed him in hospice (which is why we couldn’t find him) but isn’t interested in cleaning up after him so I have to clean up a disaster area. My question is, if anyone has had any experience in your caregiving of cleaning a nasty, crusty inside and out toilet, what did you use? Do I need to get hospital type cleaner? If so, where would I get that? I’ve already bought a respirator. I want to know that it's clean and sanitary for the next renter.
Next is part 2. Follow directions and pour in CLR to break down the ring at the water line, iron deposits, iron stains, etc. you may have to do this a couple times, swishing and leaving sit while it does it's work.
A brush or magic eraser doused with full strength Mr Clean or Lysol cleaner, etc should work on outside of the toilet, seats, lid, etc.
If that fails, consider replacing; especially if you have to replace floor, caulk, toilet wax ring, etc.
PS, make sure that you run the fan and or open a window while you are cleaning with these chemicals for safety ventilation. Never mix bleach with acids.
If the tenant was a hoarder, are you planning to clean out the entire apartment as well? If so, you could get a quote from Servpro for that, although my understanding of that company's business is primarily insurance claim cleanups post-floods, etc.
I don't think that you will ever get the stains out and I bet you need a new toilet seat, anyway.