I moved into a place with one very hazy window screen that is difficult to see through.
I have tried scrubbing it with a brush with soapy water and blasting it with the hose. But I cannot get rid of the hard material buildup. I even tried dipping a brush in CLR and scrubbing the screen.
When I Google how to clean a window screen, I just run across people telling me to do what I already tried. But I think the people touting these methods simply have screens with dirt in them.
This doesn't seem like simple dirt buildup. I enclosed a close up photo of what it looks like.
I bet if I poked all of the holes individually with a toothpick I could clean it, but that would take eons. Any advice? Thanks.
Have you tried warm/hot vinegar in a spray bottle? If you have hard water it could be mineral buildup and some warm vinegar would help dissolve it. If it's not from hard water it may be trickier, but a super soft bristled brush and some simple gree or other cleaner may work as well.
Carefully if it's a metal screen vinegar could corrode steel screen... Though it's probably worth a shot it the alternative is replacing it.