Usually you dont have to do much cleaning during this time as they dont do much and mostly sit in their hides sleeping rather than running around once they get into burmation. However water and vinegar works well for glass with the rest being able to be cleaned with warm water, dried and then baked at 250f for 30 minutes.
Youll want to
bathe them once a week or twice every two weeks, as for feeding personally i fed saturn once a week when he was just going into burmation and now that hes in deep burmation (not going out to bask, walk around, ect just sleeping) i have stopped feeding him.
You could probably do that but youd need to replace every other day or just offer salad every two days. Once they go into deep burmation you dont need to worry about it too much.