Having my tub on an elevated deck with no trees around, I get very, very little debris in the tub. Occasionally, I'll find specks of debris on the bottom. I've got this water gun device that I've had for years....purchased from West Marine.....called a
Water Blaster . Not only does it work great but it reaches to the bottom of the tub real well when standing outside of the tub....and it works great for a water cannon as well! So if you've got one hangin' around, put it to good use.....