I second the recommendation on the cover. I kept my Arrow at Chicago
Midway for a couple of years and used a full set of covers from
Kennon. The covers got filthy but I only had to wash the airplane a
couple of times a year.

To wash it, I asked the FBO where I bought my fuel (Million Air in
this case) if I could park in front of the hangar and use their hose.
They were totally cooperative.

At Gary Airport, where I now have it hangared, the FBO lets me put the
plane inside their hangar and use their brushes and cleaning solution.