Bus un-levels over time

Thanks for the advice. I will try doing that tomorrow and post the results.

Ok so here is the latest;

Went to the NASCAR race this past weekend a parked on a relatively flat spot. The bus had no problem leveling and in fact, stayed level the whole time (3 days). When I park at home my spot is out of the leveling range and I get the excessive grade light. Could it be the HWH system is getting out of whack, or losing it's position because of the excessive grade?

Once again, the level sensor!