His first ever Top Tip was that you could use a sock to dust. Like, no shit, Sherlock.
Using a towel around a frying pan lid to clean a carpet... ummmmmmmm, Iwan? a cloth or scrubbing brush or a damned hoover will all do a far better job.
They are either blatantly obvious, ineffective or more hassle than using anything normal.
I mean like last week - wrapping the entire radiator in cling film tightly enough that it doesn't wrinkle or snag when painting behind it is actually more work than painting carefully, or than leaning the rad forward. It's a bastard of a job - I tried it many years ago because I was scared of making a mess and I wasted more clingfilm and time than if I'd just got on with it.
But he's a nice friendly smiley man, so he at least brightens the place up.
Lazy, cleaning-avoidant eldest son (which he admits himself!) took one look at Iwan in white jeans and said "that guy has never cleaned something that was actually filthy in his entire life".