@Martha77, Nice to see a neighboring airbnb host.
As a superhost you are obviously doing right. If you think you are a superhost because you have short-term guests, then discourage long-term guests by removing your weekly discount.
As for your 10 day guest, consider a weekly LIGHT cleaning of the bathroom as a service. No more the 10- 15 minutes to dry down the tub, wipe the rim, swirl the toilet with cleaner, shine the mirror and fixtures. There are advantages to this.
1. You get to guage your guest and stop abuse. I hate red dye on brand new towels...
2. You don't get surprised at check-out.
3. You are already in their bathroom and taking the time to replace the towels so taking time to clean it not so problematic.
4. You can give the guest an option to improve her own space by saying "tomorrow, I'm going to lightly clean your bathroom. So that i can do a good job, could you organize your belongings?" This gives the guest the option of saying "No thats ok, you don't have to clean my bathroom'.