@Dev4 - glad you find them useful.
I don't have these in my own room rental with a max. of 6 days, but have repeatedly come across such solutions by other hosts on the Community Center.
I suggest you definitely include them 1-2 times in your description and in your House Rules you could take up a pointer to the extent of: Long-term bookings beyond xx days are subject to cleaning and a choice of supply arrangement. Service charge packages:
Basic service package: Weekly cleaning / fresh bed linens+towels xxx
Extended service package: Weekly cleaning / fresh bed linens+towels / amenity re-stocking xxx
I would then mention this pre-booking. Since you have Instant Book I'd mention it right in the summary at the top, then right after booking ("As specified in listing and House Rules....") and ask them for their choice.
There will be guests who will insist on self-cleaning, but once a host has had one or more experiences with messy and/or trashy guests, they usually stipulate regular cleaning as part of the deal.
What you could also do for ex. is forego the weekly and monthly reductions to cover weekly cleaning expenses.
Gotta be creative 😉