Before covid I'd wash my hair every morning because its natural wave/body only lasts for a day after having been washed, then it gets straighter and straighter. But since working from home, I wash it every other day (unless I've been mowing/weed whacking or otherwise getting gross). I've been using the work-from-home time to use up old shampoo/conditioner that wasn't good enough to use when going to the office (i.e., brands that turned out to apparently include wd40 and make my hair weirdly slick and straight). Unbelievably (to me anyway), its been 17 months and I still haven't used it all up. I am getting closer and hope to within a month or two start using up leftover shampoo from the guest bathroom.