Washing sleeping sack

We are changing his babygrow every day as pajamas but the sleep sack is more like a duvet cover and gets washed once every week or two or sooner if he’s dribbled a lot or been sick

We wash the sack every 5 days or so. I don't count, but more or less.

We wash them all once a week but rotate them depending on temperature. This week we’ve used the 1.5, 2.5 and 3.5 tog sleep sacks because temperature has ranged from 23-17 in my bedroom and my baby tends to feel the temperature (runs hot when it’s warm and gets real cold when the temperature drops).
When there is a steady temperature we have a couple sleep sacks in each tog so tend to still rotate them and then wash once a week unless there is a reason to wash them sooner - spit up, leakage etc

Sleepsuit every day, sleeping bag once a week xx

Once a week