Use Nu Finish.... it's fairly easy on/off and does good job. Comes in both liquid & paste. Used it for years on cars, boats and now the TT.
Suggest use Nu Finish once a year and maybe a couple other times a year simply wash TT using liquid soap/wax car wash in a bucket of water with a long handle flat-sided mop.
The Timex approach (below) works good too... esp when washing AND waxing.... just don't forget the adult beverages!
2012 Ford F150 4x4, 5.0L, 3.55
2011 Rockwood MiniLite 1809s
E2 WDH 600/6000lbs