Heyyy!! I hope that I find help here 
For about 3 months, my machine pulls less coffee than usual.I maintain my machine since the beginning - decalcify - regularly new water filters - complete cleaning of the machine (parts outside) - wöchtl.cleaning of the brew group etc etc. Have also bought a new brew group because I thought that helps - unfortunately in vain. Even adjusting the grinder has not helped.
Unfortunately, I no longer know what to do and hope that you can help me here !!!!!!
Since I do not know much about technical terms etc. it would be great if you could explain it so that even a layman understands !!!!!!!!!!!!!!
Many thanks in advance 
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