Am I stupid?

Have within a week 2 bottles consumed! Because it is not with me wirkt.Habe the tank with my Senseo with water and filled 1 bottle and leave work one hour. Then let go through and filled two times with clear water and let through. 2 days went well then again. But can also be tuned because the tank already bought at least four years under his belt hat.Hab me now a Cremesso uno and hope only times long rest.