@Grey5
"how do y’all deal with the uncomforatable feeling you get from having someone else in your space? "
You are obviously feeling that way due to your obvious lack of experience with hosting....normal for a newbie with their first guests.....
Seriously....it isnt as simple/easy as it all sounds..and you do need to have done some research and have got some understanding as to what you are potentially letting yourself into, before you begin hosting. You are certainly going to have guests whose habits are not totally the same as yours...for sure...
It isnt for everyone...especially as you say..sharing your space to people you have never met...
Unfortunately with Airbnb you cannot really pick and choose who you accept and who you do not so as long as someone meets the criteria you are likely going to meet all sorts of different people and you have to be prepared for that...
Joining a group where you can share experiences and get advice from other hosts is a good idea , or read up posts etc in this Community...to gain knowledge etc..
The air mattress probably just needs a clean with disinfectant/water mix ..I certainly wouldnt use bleach....