In my opinion any amount of handling on feeding day is unnecessary stress. So whenever I feed, I take the snakes weight, feed it immediately after that and then leave them alone for two days.
Then again, tank cleaning is kind of a rarity for me. I fill up water, spot clean poop sheds and urates, every time im next to my tanks, and check temps on feeding day, but I only do a full substrate change and PAM once a month ish. Snakes arent very messy in general, and dont smell very bad, so I dont see any reason to clean it so frequently. Unless of course they knock over a water dish or something. I use a combination of newspaper and aspen, so that requires a substrate change @_@