I agree with Longhunter and Path, I use 'whatever' is handy and convenient, and mostly that is a armpit or a sleeve.
Tried several times to fashion and use one of the Cow's Knee contraptions, but each time produces something that was more of an aggravation than anything helpful.
FWIW: I'm not sure of this, but I am told by a couple of sources, that anything made to cover the ignition system is illegal, by law, in Washington State, where the law clearly defines that the ignition will be exposed to the elements.
Having said that, I have to say I have never heard of anything ever being said about getting a ticket, being fined, or any of the other hundred plus things Game Wardens in this state can do to you if you're found to be illegal in some way.
I also have to say that every Game Warden in this state that I have personally met up with, and there has been quite a few, are some of the nicest people to be found anywhere, very pleasant, polite, and well mannered young men.............so it might well be a non-issue, as opposed to a wild rumor.
I just though I would mention that, as many other states may have a similar law in place.
Uncle Russ...