35 miles? Yesterday I rode over 300 and it never went away.
$16 bux if we had this K1600GT BMW bike. And the KiPass works on the baggage too
http://www.bmwmcchattanooga.com/products/BMW-Motorcycles/2012/K1600GT/Repair-kit--tire-pressure-monitor-valve-RDC/7242865/36318520871.html
The guys on the GTR-AUS Forum have a method with photos posted on how to change the battery in the TPMS while maintaining power to the sensor so as not to have to reprogram the thing.
Shows how to wire it up and has the replacement battery details, scroll down as it is near the bottom of the page.
http://gtr1000.yuku.com/topic/4087/Tyre-Pressure-Sensors?page=2#.UPkOSnd5eSo
I have not had battery problems with my 2011 as yet.
Cheers
Paul