You are in a hard spot. You are stressed because you don't know the intentions of the guests.
Are they scammers? Are they squemish? Are they unrealistic? Are they merely bored? Did they find a better place for less?
Will a discount quell their discomfort?
The fear of the unknown is usually worse than reality.
To compound these problems, Airbnb has an anti-host policy of treating all "bug" problems as a reason to give your money away.
We all feel your pain. I live in Seattle, where we have few bugs. No cockroaches, no mosquitoes, very few flies. Yet we do get small ants and spiders sometimes. All non-venemous. They come regardless of cleanliness or availability of food. Yet, I cringe when Airbnb's computer scolds me about a guest complaining about "bugs". Airbnb paints this Biblical picture of hoards of cockroaches, flies and pestilence.
In light of Airbnb's anti-host policy, you will reduce your financial risk and stress by limiting the length of your guest stays.
Why risk 2 weeks of income? Longer stays should be administered outside of Airbnb.
I hope this turns out well for you.