I agree with Sago's 'buyers are liars' comment. My EA was very diligent but had to work with the information she was given, which was untrue in more than one instance. I agree with asking for procedable viewers only.
I was on the market for a very long time and the cleaning/tidying is wearing. In the end I did a sparkle clean once a week and maintained it vigorously so I was viewing ready at any time, to the point of not cooking prior to a viewing in case the house smelled of food.
I wish I'd relaxed more during my sale, I feel that I put my life on hold waiting for 'the one'. I had to visit my aunt during the selling process and my son lost a day's work doing a viewing for me for a timewaster, it makes me angry to think of it. Cash buyer living in rented, second viewing, with his family and his Dad arrived an hour early and my son had to entertain him. He was a liar, he was a houseowner and not even on the market yet.
I think the best advice is to maintain the level of cleanliness you are happy with, accept that there will be some timewasters, plan nice things to do when you go out for the agent to do the viewings, do not take feedback to heart as people say the most ridiculous things, and be prepared for offers to be withdrawn.
Good luck, let us know how you get on.