Irish Moss problem

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I have for several years been having an Irish Moss problem. The spores are everywhere. I take the moss off by hand, but it keeps coming back. Is there anything I can do to kill the moss and not harm the bonsai's. Any help will be appreciated.
in a spray bottle mix 2/3 vinegar and 1/3 water and spray ONLY on the moss in the morning on a sunny day. It will be dead by noon - just remove. I've been doing this for years. As long as the spray is localized and not broadcast over the soil, no problem to the trees. I've used it on all my trees.
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