Rheem Tankless water heater for 1-2 bathroom homes, outdoor, LP - Model RTG "remove fiberglass" Questions

...Remove the insulation you exposed when removing the side panels. Depending on the age of the water heater, the insulation is fiberglass or closed-cell extruded polystyrene foam. Wear safety goggles ...

...and I have hot water. But I now have also condensation which I do not have before for sure. I removed the element access covers and they are wet inside and there is rust on them now. The ...

...remove heat trap inserts with screwdriver or needle nose... careful not to break insert so it falls into tank ... which can then get lodged in hot water line elbow or under-sink shut off. ...

...remove the element(s) and apply teflon tape or sealant to the threads and re-install, do not over tighten. You may have a crack in the fiberglass tank. Water is leaking down into the metal tank which ...