Yup - had the same epiphany with the bedding as well - I wash it as needed due to an exploding diaper, training accident or visible dirt like a bloody nose or whatnot but other than that I do it monthly too which is the equivalent to 'weekly sleeping hours' of their bed linen at home assuming parents washed bed linen weekly - no lots of people who do not even do their own bedding at home that often

Again I can empathize that in a CENTRE which these rules are made for that the need would be higher because of how bedding is stored, exposure of germs being higher and so forth - however in my 'home' each child has their own personal cot and it is not stored with 'other cots' in a pile like in a centre but rather tucked into a closet in which ever room they are sleeping - no worries there!

The only sheets I do 'weekly' are the two infants crib sheets from the pack and plays because they drool more, leak more often and so forth and well I take those down every Friday for the weekend so am 'stripping' them anyway!