He'dleftapanofwateron thestoveand it hadboileddry.
Don'tletthelentilsboildry.
Check thefishnow and then to makesureit hasn'tboileddry.
Top up thewaterlevelregularlyso that it doesn'tboildry.
Neverallowapantoboildryas it willshortenitslife.
You don'twantthebeanstoboildry- they'llburn.