Tips & tricks for switching a ball python to out-of-enclosure feeding

[200xth]

I change the water almost every day. Now when I open the tubs, my snakes just sit there looking thirsty with their bathing suits on.

I have 11 (soon to be 12). All get fed in their enclosures. No issues.

My friend has 42. He feeds in the enclosure. No cage aggression.

I personally think the snakes exhibiting cage aggression are either underfed, or stressed for some other reason. Feeding them in their enclosure is not the reason.