I have been using my AeroPress for years and love it. Recently with no change in grind or technique the water has started flowing through quickly before I plunge so that the final result is weak. I have ordered a new plunger but don't think that will make a difference in the water leaking through. Could something else be wearing out? – From Peg K.

Your AeroPress has probably not changed. More than likely your grind has changed even if you (or the store) are using the same grinder. Try setting your grinder on a finer setting or, if that does not help, have your grinder serviced. Grinders get dull with use.