The “stripping”(comes of the English to strip that means to strip, to say wash deep)
If after a few months of use you notice that clean diapers stink, it probably means that you have to change your washing routine, nothing too serious you can almost always remedy.
Stripping consists of several consecutive washes at 60 degrees C without detergent. The aim is to eliminate any residues of ammonia or detergent in the fibers.