I have a long table like this:

Car,date last washed
Civic, 11/1/2012
F150, 5/4/2013
Corvette, 7/3/2013

If I washed the Corvette, I'd add another row to it:

Corvette, 10/22/2013

And I would like to remove the "Corvette, 7/3/2013" entry. What's the easiest (read: least user intervention) way of doing this?