I have a Great White auto cleaner. I don't have a high dirt load, and I have a screen lanai. How often should I keep the cleaner in the pool?

I have been keeping it in the pool (and plugged in) most of the time that I am not in it. I figure it at least keeps scrubbing the bottom of the pool and most of the walls, so less scrubbing for me to do each weekend with the brush.

Any harm in this? I guess it may wear out the brushes faster, but that seems like a small cost.

Thanks for input on this.

(Pool is 28 X 14 feet in size, about 12,000 gal)