The WMF cleaning tablets WMF 1407029990 Reinigungstabletten 2x10er Blister I suppose the cleaning / degreasing of our coffee machines. They are packaged in a blister with a white and a yellow tablet. The yellow "tablet" is a sponge, is inserted into the opening at the bottom of the brewing unit, it is the white cleaning / Entfettungstablette. The yellow sponge lies down on the brewing sieve and prevents this sieve is clogged by the cleaning tablet. The yellow sponge after cleaning must be removed again, of course. The appeal of the yellow tab is ONLY for use in designated original WMF coffee machines useful. In our Melitta fully automatic opening of the brew group goes down in great depth, a subsequent fumble out / find the yellow sponge is hardly possible. So important for all owners of non-WMF coffee machines: Only the white tablet into the opening of the brewing unit!
Unfortunately, lacking even an instruction manual in the delivery. But the WMF customer has answered the question of the strange yellow "tablet" within a day via e-mail.
Conclusion: Cheap brand quality. Cleans / degrease the brew group well. Who does not want to use NoName chemistry, can grab it. May this review have been helpful to you.