Got rid of the mildew on my Trex deck
Since it almost Nov and our 15 month old deck had mold on it -- it was time to try and clean it. Some areas were worse then others -- having a real "leopard" look to it.
Bleach is what you need -- we bought a Behr brand cleaner at home depot and put it in a garden/deck sprayer. Spray it on, wait a few minutes and use a push broom to lightly scrub. Then rinse well. Some really bad areas took longer. All the mold is completely gone now.
Cleaning it cost $4 and 2 hours time. Sure does beat spending $350 to have it sanded, stained and sealed every other year.