rince thuroughly and make a dead batch ot two of just water and you should be good

will it make my coffee taste not awful?

CLR it.

i wash mine out with vinegar and then run plain water thru it several times before making coffee again. It helps make it run better

ah, i see. I really just want to get to the bottom of why my coffee has started to taste bad. Maybe the brand I buy has changed something?

try cleaning the coffee maker before changing coffees. It does make a difference I think