getting spots off of speedometer plastic

How do you get little white/grey spots off of clear plastic.

Especially when there is no reason they are there!

I have my speedometer cluster out so now is the time to clean it.

It has a clear plastic window in front that at the top is just about vertical. Further down it curves around to 30^ from vertical, and the more it approaches horizontal the more spots it has. As if they are caused by something that falls. Otherwise, the plastic is like new, totally clear, without a scratch, and even wheree the dots are, I can't feel anything. 2005 Toyota.

Rubbing with a watery rag does nothing, rubbing with my finger does nothign also.

Greyish spots one millimeter or a little bigger.

What are they?

What are they from?

I spit as much as the next guy, but I don't remember ever spitting in the car at all, and certainly nowhere near hard enough to reach the speedometer. So where did this stuff come from? Even in the rain with the convertible top down, it's not going to get rained on.** what made these spots?

And, most important, how should I get rid of them?

**Sometimes I drive in the rain with the top down, but even I don't get wet, so how could the speedometer get wet. And I've done that only for 5 minutes in this car. (In an earlier car I drove for an hour until the rain stopped. Get a few drops on the top of the rear seat, but everything else stays dry. The harder it rains the faster you have to go to keep dry.
Reply to
micky
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Try toothpaste. Contains mild abrasive but will not harm plastic. Also about 15& isopropanol is used to clean acrylic but do not use any pure solvents as acrylic is soluble in many.

Reply to
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Too bad you have me blocked. The stuff works great on helmet face shields.

Reply to
rbowman

I tried all the suggestions here, and none worked, so I ended up putting it back the way it was. When it was in place, I couldn't see the spots, only after I took out the speedometer, so I guess that will do.

Reply to
micky

Consider the possibility of humidity condensing on the plastic, dissolving whatever crap might be in he air or the dust on the plastic and then evaporating.

Reply to
The Real Bev

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