For noise removal I, and several other users in the forum, use NeatVideo - there is a demo Magix version here, for testing on your system, scroll down to the bottom of the page to get the download link.
This is a paid for plugin and the results I get are impressive.
Note if you like the plug-in, decide to purchase and are working with video resolution greater than Full HD 1920 x 1080 then you will need to purchase the Pro version.
I have no connection with NeatVideo other than being a highly satisfied user
It depends on which way the sun is coming into my office whether or not I see the dust on my screens. I use a Swiffer once in a while; it helps greatly.😁
If the dust is in the video, then another vote for Neat Video.