yeah software regulation typically just leads to (successful) google searches for how to disable said software. IMO you'd be better off monitoring screentime yourself and enforcing boundaries with clearly communicated rules and consequences.
edit: if you meant that the kids would seek out software regulators to create self-imposed limits then i'm all for that. but that takes some awareness and discipline.
Doesn't need to be a tissue. a gentle hand down the forehead and over the eyes / down the bridge of the nose works too. But that alone won't do the trick -- you can't just take a baby from playing patty cake one minute to a 40 second tissue fluff and expect them to fall asleep. They have to be ready for sleepy time for this to put them over the edge.
next subjects to attempt: strangers