Why cages are a soft wash job
A pool cage is a tensioned mesh on an aluminum frame. High pressure stretches and tears mesh, pops spline out of its channel, and flexes frame members. The growth on the screen is algae and mildew, which dies and rinses out with a low pressure application of the right mix.
I clean the full enclosure: mesh panels inside and out as needed, frame members, kick plates, door hardware, and the gutter line where the cage meets the house. The deck below usually wants cleaning at the same time, and doing deck and cage together is the most efficient way to get the backyard back.

Straight answers
The questions I actually get, answered the way I answer them on the phone.
Will cleaning tear my screens?
Not with soft washing. Tears happen when someone puts a pressure tip near mesh. If a panel is already failing, I will point it out before work starts so nothing gets blamed on the cleaning.
Do you clean the top of the cage?
Yes, the enclosure top is usually where growth is worst. It gets the same low pressure treatment, applied from safe positions.