For myself. I purchased a pump years ago.
Sump pumb. with a hose.
For cleaning. Depends on what you mean for clean. Climbing in with a ladder and washing with detergent/bleach ?
Then you have to figure out how these critters are getting in.
If you can't do this yourself and don't have neighbors, friends, or relatives to do this. Then I guess - telephone a well company.
There are plenty of well companies around the Lakes Region.
Roth
Thomas
Daniels
and many more.
There used to be dedicated pump companies. Miller in Meredith was one. But sadly - he passed on.
Maybe someone else can chime in with suggestions.