Goodness, that is totally not what I offer AT ALL!
Not sure where you got that idea, but Self-Clean is about the guests agreeing to do laundry, and who have fresh linen and towels easily accessible in tubs under their beds.
Most of them always do laundry, and always make their beds fresh. However, I noticed maybe one guest group each month or so might not make their bed fresh. I was surprised as you at finding this. But I guess we hosts are not bed police. We don’t ask for a marriage license before allowing a couple to share a bed, we don’t care if there are two women sharing or two men. (I hope).
I guess I could have a big sign up that Guest will be banned or fined if they do not correctly make their bed with fresh linen, but should we be the bed police lol? I think not.
I personally would never want to use a prior guests towel, and I certainly provide fresh towels to all guests. But I only sometimes wash sheets before sleeping when I am there myself. Because I know they were washed yesterday. If I am tired coming back late, I would certainly check them to ensure they are clean, and if so - I personally don’t care. I get it that some folk freak out and think all guests have leprosy or goodness knows what, but would you sleep in a bed after it was A) Washed yesterday, and B) It was your sister staying just one night. I am guessing you would not freak out given this.
Well, so long as you understand I don’t think it appropriate to be offering any sort of listing that wasn’t designed to have clean, fresh sheets - I hope you see it might not be a problem if some guests don’t care.
Further, I had a lady from GreenPeace staying once, who specifically said she would be checking the sheets and wanted to know if it was ‘allowed’ to not change if they looked, felt and smelt clean, and were washed very regularly (which they are). I said yes of course - I don’t mind if that is what you want. She explained how we are heating the planet and excessive washing was part of the problem, along with the excessive use of chemicals. She thinks it ‘eeeekkkk’ (did I get the right number of e’s and k’s? lol and pretty gross that humans are polluting the planet so badly. She was also telling me about a recycling program she worked in, where restaurants sell food in plastic containers that are sent back to be washed and reused. No doubt people could be all eeked out by that too, and prefer only ‘virgin’ plastic used for their meal. Same with recycled water from sewage, which is heavily processed. I get we might want to keep our mindset of what is clean, but if this causes untold earth pollution problems, it might be worth re-thinking.
But that all said, I do not think it appropriate to offer any listing that doesn’t have fresh clean sheets, as I do always. In a tub under their bed. I trust you see it not our job to be bed police if they choose not to bother though - and there is probably a case for this being good for the planet anyway.
But can I ask you - do you ever clean your unit? Do you ever wash sheets after strangers have slept in them? Scrub the toilet? Is it pretty gross and should be banned? Or is it ok for you, but just not ok for anyone else? A lot of my Self-Clean guests are already hosts. Some work as cleaners. Is that gross? If I hire someone to clean, is that gross? If I discount a stay to compensate the ‘cleaner’ who is staying - is that gross?
What should matter most is that the stay is cleaned to a good standard that is acceptable to the guest. That is the bar, and as Jaquo has aptly said - nobody cleans as well as a host. Well, this is also true of MOST of my Self-Clean guests *who are still a minority, as most are professionally cleaned. Because they clean the house as well as they personally want it - and you would be surprised just how well they do it. Some go a bit over the top, as you can see me thanking them in their review responses. It feels good that people care so much, and like me, want a nice clean house to stay in.
Another point - any host that is freaked out by the idea of hiring a cleaner to clean their listing (being the guest - and who is vetted, and paid via discount)… should be aware of this point. If offered, some of your existing past guests would probably be happy to agree to have self-cleaned On-Arrival if that was offered to them. It’s not that you get different guests, and more of my Self-Clean guests are either older couples, or wedding parties wanting early check-in. They are good, nice folk. They leave excellent reviews. I had to smile as another host here was criticizing my own cleaning standards, yet her listing isn’t scoring higher than mine on the Airbnb score.
I had a friend who works in a department store. They get so many returns every day, and a large number of them are restocked as is. The policy is it should not be worn, but some are returned weeks later, and obviously worn but they are good enough to be restocked as is, so nobody cares. Ideally with tags still, but half the time they need to add more tags, or sometimes sell as discounted. So those freaked out by other humans - should wonder if the new dress they bought was perfectly clean, but had been previously worn lightly. Worth thinking about. I am comfortable eating food past it’s use by date if I check and it is still looking and smelling good, and clothing etc should be the same. We should all be adult enough and smart enough to check for what we feel is clean, and if we don’t like we don’t take or we clean it ourselves.
I am frequently picking up toilet paper and towel from the floor of public toilets or hotel / restaurant toilets that I use, if I see anything there. Is this pretty gross? Some folk would give a snooty complaint to management, but never dare to take a few seconds to pick up some rubbish to make it nice and clean for others… and that is unfortunate. We should all take the time to make the world a cleaner place 
