Response from Aaron:
I wish the manager had mentioned that there wasn’t going to be a thorough cleaning of the house after us leaving. Had we known, we certainly would have removed all the trash from the premises. In all the air bnb places we have rented, there has been a thorough cleaning of the house after every guest which includes doing things like taking out the trash—although if asked, we are happy to do those things ourselves. We live in Leon, GTO (about 45 minutes from Guanajuato City) & we hire someone to clean our house for 200 pesos (about $17) & they wash the dishes, remove the trash from the bathrooms, dust, clean the floors, etc. We left the house neat but it is true, we left 2 coffee mugs & 2 water glasses in the sink unwashed & we did not remove the trash from the bathrooms because we assumed after renting the house for 4nights/5days that someone would be paid $15-$20 to get the place ready for the next guests. The mystery smell, I do not understand as we used the other bedroom (the back bedroom).