@Az1
For long-term guests, I state that I will change sheets every 2~3 weeks as needed or upon request. I've asked around and most people I know seem to change their sheets between every 2 weeks or 1 month, depending on weather, personal hygiene and difference in BO. Personally, I change my sheets about every 2 weeks. I would be willing to provide weekly changes IF the guest absolutely wants weekly changes but I haven't had any takers yet 🙂 Everyone has seemed fine with sheets changed every 2 weeks or so. For blankets, I use blanket covers and wash the blanket between guests only.