I recently purchased a somewhat abused Trek FX 7.3 and have been slowly going through and servicing everything. I am relatively new to cycling, and bicycle maintenance, but I am fairly mechanically inclined and I enjoy doing my own maintenance. Today, when I opened up the headset, a lot of water flowed out onto the ground. I have had the bike in the garage for the past 3 days and it has not spent more than 20 min in the rain the week before that. Why would there be so much water in there? The headset is a cane creek aheadset slimstak which has semi-cartrige, sealed bearings and everything still seems very smooth for now. However, I am worried that with so much water sitting in there for who knows how long, there could be some problems in the near future... Any recommendations/concerns? Should I replace the headset? Just replace the bearings?