Well, problem solved. Turns out with the Advantage Plus, there are two plugs, one on either side of the fire box. I think it's the Advantage Plus' answer to cleaning out the ash baffle without removing the fire bricks. When I popped off those plugs, there was a ton of ash behind them. I vacuumed them out and now both side of the burn pot are fine!
But you have a good point about the heat exchanger tubes. Mine are kind of corroded.
--Susie
But you have a good point about the heat exchanger tubes. Mine are kind of corroded.
--Susie