Awesome, thanks for the answer. That's a really good feature that they should mention on their website as I'm sure I'm not the only one it's happened to.
So I ended up creating a new sheet and now I've got 2 sheets
Knowing how the google sheets can be manipulated would also be useful.
Like...
Hey Brewers - I've been using a Tilt with quite a lot of success connected to an old iPhone 4. Unfortunately the iPhone ran out of battery because the charger got pulled out :/ As a result this stopped it logging the readings, luckily I've noticed within the hour.
I want to start tracking...