I did not use my m:s in a long time and put it out of the ECC-5 today.
To my surprise my m:s took some black color of the ECC-5 inside fabric on some spots of its white enclosure.
Tried carefully to rub it off / clean it with a damp cloth but did not get rid of all of it.
Has anyone also this problem with the m:s in combination with the ECC-5 bag?