Removing best before dates from fruit & veg

I buy a lot of lemons and it sometimes surpries me how quickly they go mouldy. One day they are fine, the next day covered in mould. A hard fruit to put a date on methinks?

I told one of the church ladies that, if you coated a lemon with Vaseline they would keep longer. Then I got a bit carried away, putting on a silly voice saying" Its all right, dear, I'm just vaselining my lemons". 

Maybe it wasn't the time or the place.............