holy thread from the dead. I would have voted plexus, but have you seen the cost increase in the last few years...
NO KIDDING! I stocked up on Plexus a couple of years ago because I use it on my helmets and front end of the bikes (makes bugs just wipe right off). Saw a large can last week for $25....used to be half that!.....Hell, it's gettin' cheaper to eat money than buy groceries!
HJC does not recommend cleaning any shield with spray on type chemical cleaners. A reaction between shield and cleaning chemical is possible, resulting in haze build-up and distortion. HJC recommends washing the shield with warm water and soft cloth only. We also recommend cleaning the shield as soon as possible after dirt and debris have accumulated. Do not let debris sit on the shield for any extended period of time. If debris has accumulated over time, it is recommended to clean the shield in several applications. This allows the debris to break down with every application. Excessive rubbing can lead to scratching as the hard debris can act as a scuffing agent. The same can occur if low grade rigid paper towels are used.
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Water and dish detergent (liquid kind) gently rub in with finger tips allow ad sspots to soak. You shouldn't be in a rush.
Fairy Liquid if you have that.
It's also the best fog preventer I've found apart from a pin lock insert. Smear it on the inside of your visor (or glasses if you wear them), allow it to dry, then polish off. One application works for about a week of commuting in the rain.
Another tip - if you use a pinlock and need to remove that from the visor to wash it, after it's dry put it in a sealed plastic bag along with the visor and a sachet of silica gel and leave it overnight. The silica gel absorbs any remaining moisture so that when you refit the pin lock both it and the visor are bone dry.