A link on this Forum to Intemos.com proved very helful.They sell swabs and fluid which are very east to use,they provide very easy directions as to how to use.I clean all my sensors when they show lots of dark spots.I used to send my cams off to be cleaned,but if I can clean them,anyone can.
I did try with a blower,but made things worse.So now do a wipe clean with the swabs,and yes,it does work.
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