Bleach damages the microfibers severely.
Fabric softeners coat the fine microfibers.

Chemical residues from fabric softener cause cleaning streaks.
When washed without a laundry net, the fibers absorb washed-out dirt particles and tiny lint from other laundry items. For this reason, drying in a tumble dryer is not recommended.
In the intense heat of the tumble dryer or for example on still warm glass ceramic fields the MicroSauber fibers can stick together and lose their ability to absorb dirt.