It also occurs on certain types of glass.
Some of the modern plate stuff seems to have a much flatter, mat finish, causing more 'drag' on your scrim (or microfibre, it can occur with that too!).
Combine that with low winter sunshine and every flaw in your work will show up.
When that light is at the right angle and position you will even see lines from where you turn your squeegee.
A slightly damp scrim or microfibre reduces the 'fluff' left behind though, but you are better not to touch the glass after squeegeeing at all, as Squeaky said in another thread, don't wash quite to the edges of the pane, and quickly wipe around the edges with a damp scrim...sort of pre-detail detailing
Then if your squeegeeing is up to scratch you won't need to do any further detailing
You will find this won't happen on old fashioned glass, the finish is far more 'shiny'.
Ian