How to Clean Lanai Screens (Without Tearing Them)

A lanai or pool cage is the best room in a Florida house right up until the screens go grey-green and you stop being able to see out of them. Cleaning them is genuinely easy — the reason so many people end up replacing panels instead is that the obvious tool is the wrong one.

The short answer

• Do not pressure wash screens. It stretches the mesh, blows out the spline and tears panels.
• Soft-wash instead: a gentle cleaner, a soft brush, and a garden hose.
• The black streaking is usually mildew and algae feeding on organic film, not dirt.
• Do the frame and the track at the same time — that is where the water sits.

#Why pressure washing ruins them

Screen mesh is designed to stop insects, not to take a concentrated jet. A pressure washer stretches the weave so it never sits flat again, and worse, it drives the spline — the rubber cord holding the screen in the frame channel — out of its groove. Once the spline is out, the panel bags and has to be re-screened. People do this once and blame the screens.

#The soft-wash method

• Sweep or blow off loose debris and cobwebs first, top to bottom, including the frame corners.
• Wet the screen with a normal garden hose.
• Apply a mild cleaner. Dish soap in warm water works on light film; a proper outdoor mildew cleaner is what handles the black-green staining.
• Work in small sections with a soft-bristle brush on a pole, supporting the screen with your other hand or a flat board behind it so you are not pushing the mesh out of the frame.
• Rinse thoroughly from the top down. Any cleaner left behind is what the next round of growth feeds on.
• Do the frame, the kick plate and the bottom track last. The track holds standing water and is where corrosion and growth start.

#Why it comes back — and how to slow it

The dark streaking is mildew and algae growing on the film of pollen, dust and salt that settles on the mesh. Our humidity means that film is always damp enough to support it. Rinsing the screens with plain water every few weeks removes the food source, and that alone doubles how long a proper clean lasts. Trimming back vegetation that touches or shades the cage helps too, because shade and trapped moisture are what the growth wants.

#Doing it in the right order

Screens first, then the deck, then the glass. If you clean the glass first, screen runoff will spot it and you will do it twice.

#If it is a big cage

A two-storey pool cage is a ladder job, and ladder jobs around a pool deck are where people get hurt. Exterior work like this sits alongside our pressure washing and deep cleaning services across the Treasure Coast and Space Coast — same crew each visit, fully insured, written price before anyone starts.