I haven't listed my space yet as I'm still working on doing updates to the property. I have checked with a local cleaning service and they are going to charge me $35 to clean the space( it is a studio size apartment). They will vacuum, mop, dust the main space and clean the kitchen and bathroom. I will wash, dry and change linens as I'm very picky about how that is done. It will be done after every booking whether 2 nights or 7. So having that amount divided up only seems logical to me. I'm going to list my cleaning fee as $40 ($35 for the cleaner and $5 for my supplies) as I feel that divides easily on a 2 night stay, which is what I think I will get the most of. I'm also going to add a second cleaning fee for anyone staying over 7 nights as I will want to do a clean and do fresh linens on day 7. I am not sure how to work this out but I do feel that regular maintenance and cleaning is better for overall upkeep. I don't think this will happen very often so may not ever have to worry about it.
So I look at it like this, I want to charge $90 per night, and a $40 cleaning fee. On a 2 night stay it will divide the cleaning fee by 2 so add $20 to the $90 making it $110 per night. This is what my most common booking will probably be so that is what I'm working from. But if I just do a flat rate of $110 then someone who books for a week ends up paying that $20 x 7nights. If I do a fee that gets divided then they pay $96 per night instead. From what I've been able to see when someone does a search for a property, Airbnb shows the nightly rate with the fee divided up over the number of days requested. Most of my guests will be American so they'll get it.