I love a clean window or mirror. It's my favorite thing to clean, especially now that I can do it perfectly with just microfiber and water! I was amazed when I tried the window cloth side by side against window cleaner & a paper towel. The cleaner left a residue I never noticed before. The window cloth blew me away.
Here's some best practices for using a microfiber window cloth like the Norwex window cloth.
Ideally, you want to remove any major grime (doggie or kid slobber, bird poop, food, etc) with a wet enviro cloth or another cloth with more scrubbing action before wiping it down with the smooth fibers of a window cloth. The purpose of the window/polishing cloth is to get a perfect polish, not to remove heavy grime. You can then use a dry window cloth immediately after to dry and polish the window or mirror. If there's no heavy grime you can spritz a little water on the window or mirror to help remove any oils, then polish it until its completely dry.
Occasionally at certain temperature and humidity increases static on the surface to be cleand and the cloth may leave tiny sparkling specs of dust behind. End the static war by using a damp cloth over the mirror, then follow with a DAMP window cloth and allow the surface to dry streak free.
If lint is still left behind, check the last time you cleaned your cloth or make sure you laundered it properly.
If the mirror or window only has dust, consider using a dusting mitt. Or for massive windows/mirrors use the a clean dry microfiber mop. It's a lot faster. If there's a few light fingerprints, dampen the dusting mitt and hit those spots first. You'll still end up with a clean and perfectly polished surface.
