You need to make sure that the area underneath the carpet and any sound dampening material in your dog house or under the hood is not saturated too. See the last line of the item from "hose and fittings.com" I am not sure you can ever clean it enough to make it "fire safe". I sure would get a professional opinion before I started the engine. It could be that the hydraulic fluid is one of the fire resistant type and that this is not a major issue. However, in my opinion, the possible consequences are so bad that I would not risk losing my coach or worse without someone knowledgeable looking at it.
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