rule of thumb

Academics have tried to come up with some rules of thumb for sizing.

But there is a rough rule of thumb.

“I would say in the interest of just being as risk free as possible, two hours, at least, seems like a good rule of thumb.”

A good rule of thumb is to have your sugar solution fill approximately three quarters to an inch of your saucepan.

There’s no agreed-upon rule of thumb for when you need to call a professional cleaner or damage repair service, but your proximity to the flames and the length of exposure can be key.