The message t
from "Paul D.Smith" contains these words:

If it's aluminium, you might want to borrow or hire a high pressure washer.
I used one to clear up a similar second hand greenhouse.

For the glass, I cleaned it once (do NOT direct the jet straight at the
glass, hold at an angle so the water "chisels" across the glass), then used
a "razor/stanley blade paint scraper" to remove the stubborn filth and then
cleaned once more.

Or, you can use a bucket of soapy water or Jeyes fluid in water, soft
hand brush and an ordinary hosepipe.The brush is from your household
dustpan and brush set. Wet glass with hose, wash over with soapy brush,
rinse with hose.This works really well on a completed GH.

If you're washing the separate panes before reconstruction, remember
not to stack clean wet ones against each other; they are really hard to
separate.

Janet.