I use the pre-washed scrims from the window clean centre.
Not perfect but after a few uses they don't leave anything behind.
Tried micro fibs the only problem i have with em is my mrs doesn't like me washing my clothes in washing machine, do make it smell
Bought 10 pre washed scrims when i get to no 8 i'll drop em in at the laundrette, coun't trust them to NOT use fabric softner for micro fibres.
Fabric softner wouldn't be great for scrim but wouldn't ruin it.
Also with scrims you could wash yourself in a bucket and wring out to dry.
Or if not bothered don't wash en and downgrade them to sill clothes after a couple of month's
I think scrims work out cheaper in the long run and i don't think there's much difference to micro's as long as you buy the pre-washed scrims.
Lee