I recently got my first oil change in a 2005 Prius. Didn't want to pay the $90 the dealer was asking for the service, so went to an oil change place. One problem, how do I turn off the "MAINT REQD" light on the control panel? The manual says it's an indicator that an oil change is needed, but now that I've done it, I'd like to shut it off. Any thoughts? Thanks!