More than once a week in my teens, my dad used to coach me on (manual) dishwashing technique and it drove me mad. My teenager can't load the dishwasher for love nor money (rotating arms blocked, filthy plates two to a slot so water can't get between them, etc).There's been something a bit like mindfulness in just leaving him be and then remedying the issues after he's gone to bed, reminding myself while I do it, that I'll miss his shitty dishwasher loading technique when he moves out.