This Morning star Alison Hammond presented the show on Friday alongside Dermot O'Leary as Phillip Schofield and Holly Willoughby take a half term break.
The conversation turned to children's internet use during lockdown, and Alison revealed she turns her Wifi off at 8pm.
She added her son, Aiden, 15, sticks to her rule, winning praise from viewers.
"What I did early on is I downloaded an app called Wifi Blocker," she said.
"My son will absolutely hate the fact that I'm telling everybody this but it was the best £5 I ever invested.
"Once you are locked on to the internet, you can isolate certain devices in your house, the Xbox, the Nintendo, the Switch, the phone.
"You can isolate it and block it off, so you can still do your working online but they switch off.
"It sounds quite cruel but they do get used to it," she added, saying she used to hear him roar with anger in the beginning.
One fan tweeted: "Not cruel at all alison! That's called good parenting! As hard as it is these days.. I think parents are Lucky....so many devices and tech that you can take away as a punishment! #ThisMorning ".
Another gushed: "I love @AlisonHammond on @thismorning she's so brilliant she's so fun and down to earth but also is caring and understanding to the serious subjects.
"I loved her advice on internet safety for your kids #ThisMorning ".
A third added: "Best episode of #ThisMorning for a long time!
"Definitely time for a shake up of the presenters! More Alison, Dermot! Also Rochelle, Ben Shepherd & Davina!".
* This Morning airs weekdays on ITV at 10am
