I have a wonderful renter who had to go to the doctor due to an allergic reaction. The doctor isn't sure what it is .... but told him it could be my pillows or mattress. I feel so bad. This has never happened before. He booked for 33 days and is leaving 2 wks early. He is not upset with me at all and does not feel anything is my fault. I suggesed he check out tomorrow on AIRBNB and if I rent that room out again, I am happy to refund him his money. Should I refund it anyway even if I don't rent it out. Probably the proper thing to do? Suggestions?