I have had my areopress for three years. I took several months off from using it and began using it again on a daily basis a couple months ago. It worked great for few weeks, but recently it has become impossible to press down the plunger no matter how hard or gently I press. Do I need a new seal or a whole new plunger? – From Julia S.

Sticky coffee oils can build up in the chamber. If the inside of the chamber feels sticky when you drag you finger on it, then clean it and the rubber seal with vinegar. After that wipe a bit of vegetable oil on the edge of the seal that contacts the chamber.