Today on our way back from Florida I stopped at the Supercharger in Auburn, AL with my battery at 1% (was aiming for more of a buffer, but didn't anticipate a 12mph headwind!) and plugged in to stall 1B. The contactor kicked in, and within a moment I was happily charging away at 115kW. However, within the first 2 kWh the rate started to decrease dramatically, and about 5kWh in I was only charging at 70kW. I disconnected, shifted down the line to 2A, plugged in, and once again started out at 115kW, only this time at 4kWh in I was already down to 60-65kW... even worse than before! For the record, I was the only car at the station the entire time, so I wouldn't have been sharing a charger stack with another car. Third station I tried, 2B, worked perfectly, however. Sustained 115kW until the usual SoC taper point, and had no trouble at all with early taper. Auburn is one of the older stations (though the charging handles have been replaced at some point, since they do feature the new style of release button) and I've seen this same behavior on a recent trip at Louisville, Bowling Green, and even at the station in Brentwood, TN at the service center--all of which are older stations. I suspect that the contacts on the charging connectors are getting dirty, and that there needs to be some more regular maintenance taking place with these. On the same trip that took me through Louisville, Bowling Green and Brentwood, I also stopped at the new station in Athens, AL. The first (and only) station I plugged into also had no trouble with taper, presumably since it's still nice and new. So, anyone else noticing this? Is it time for me to start carrying contact cleaner and swabs with me on roadtrips?