Click on 'Articles 2022', and read the one at the top, called "Lots of contradictions".
Well worth it.

Ad is Dutch, and his use of English is a bit strange to us, but he is a goldmine of experience gained at the top of the sport.
The sputniks are cracking mate, you certainly made a good job of them.Murray wrote: ↑Sat Mar 26, 2022 6:47 am I had a fair idea of what might be a part of the problem.
The back wall vent has 1/4 inch square mesh over fly mesh. It keeps bugs, mice, snakes and any other undesirables out. It also gets clogged up and needs cleaning from time to time. They were moulting, so it seemed a bit pointless, and I had fallen on a knee that I wrecked many years ago falling of a racehorse. So kneeling down has been a problem.
Story short, it needed doing.
I removed the mesh and used the vacuum cleaner to remove all the crud in the screen,
Put it all back together and it looks much better.011.JPG