How often do I need to change the bag in the Roomba j7+ self-emptying base?

The self-emptying base on the [Roomba j](https://www.amazon.com/s?k=Roomba+j&tag=wehavethat-20)7+ holds about two months of dirt, so you only swap the sealed bag once every eight weeks. Never touch the dustbin, never deal with the puff of dust from manual emptying.