1) Find a trustworthy young teen who wants an afternoon's work. 2) Communicate with parents re their approval and signature for liability release (beyond homeowners insurance). 3) Hire them for a set fee. 4) Provide detailed directions. 5) Bake cookies while they work. 5) Pay more than set fee for a job well done. 6) Enjoy their request for more work another time.
or, Less Preferred Method,
Attach a rigid tube with a bent end to your garden hose and do the best you can with it.