Every couple of months I take my poles apart, wash them out & dry them.
Weekly basis I clean my brushes out
After each job I run the hose on both the reel and pole through a wet cloth to keep them clean. I also have velcro straps on by my rectus 21 fitting on the pole hose, loop the hose, vecro it up and hook it over the brush.
Look after your kit and your kit will look after you !