How to delete a google apps script service

Question

I tried a particular app script (Gmail Meter) by adding it to a spreadsheet. Even though I think I deleted the spreadsheet (manually checked through past spreadsheets), it did not quite delete the service and I keep getting alerts (I revoked its permissions somewhere and I keep getting notifications that the service requires authorization).

How do I delete this service permanently?

Answer 1

Strange. Maybe, Try checking if the trigger is still there:

Open a spreadsheet then go to Tools -> Script Editor, then on the editor window go to Edit -> All your triggers... and see if the gmail meter method is still listed there. If so, delete it.