Congratulations Becky. I would do a few things. 1st I would sterilize the water lines and tanks. There are directions in your owners manual. You do not state how long it was between trips, nor if you drain your hot water heater tank. I drain my tank if we are not going out for a few weeks. The plug is not in the greatest location, so I made a drain hose adaptor. Basically, I replaced the plastic plug with a plastic adaptor (that was threaded), I threaded in a short piece of brass pipe then added a short section (1?) long flexible hose you would find under your kitchen sink, and then added a ¼ turn valve on the end. Now all I have to do is open the valve, and release the pressure relief valve and the water heater tank drains in a few minutes, with no tools.
Using a water filter might help too. Some CG have nasty water.
Here is a picture similar to what I did, but my ¼ turn valve is much smaller.