5 points
When I can smell them.
3 points
Once a week. I hate feeling like the sheets are dirty and rumpled.
1 point
When they stop feeling clean. Why are you all counting days?
6 points
Once a week.
1 point
In summer roughly weekly sometimes less for both. In winter all the bedding but the duvet cover monthly (we wrap the duvet around us like a burrito and thus change it more often). Towel biweekly in winter.
