@Maria13874 It is certainly true that guests can make up complaints, and say things that aren't true in their reviews. If you really are sure the complaints aren't valid, as you know, you can leave a respinse to the review to clarify things for future guests (and take the advice you've received as to how to respond to reviews- do not use a response to attack the guest, or to sound defensive).
There can be plenty of guests who aren't that fussy- it may be clean enough for them, or they just don't even notice those things. And there may be others who are more observant and particular.
You say the toilet and sink were clean. How about all the corners of the floor, behind the toilet? If any area which guests have access to is seen as unclean, it will affect their view of the cleanliness of the place in general. That goes for any common spaces you share with guests, as well. The stairs they walk up to get to their room, for instance.
That you have medical training really has nothing to do with whether you know how to clean properly. I had a doctor friend whose home was the dirtiest, messiest house I've ever seen.
All that said, your house may be perfectly clean. I haven't been in it, so I wouldn't know. But if you are getting low cleanliness ratings and comments, from guests who aren't using that as an excuse to scam a refund, then you should take it seriously and ask some fussy OCD family member or friend to come by and critique the cleaning level after you feel you have done an adequate cleaning.
