Original post by: Bruce ,
Follow up to "Mark" Our cups seem to be under pressure, not vacuum, possibly due to altitude (over 5k ft). I push them down so the needle punctures the bottom, then repeat after turning the cup until there are 6-8 holes in the bottom. Also have better luck with the plastic k-cup you fill yourself. Before this my brand new machine was clogging and short cycling starting with the second cup!