New owner, and my TPMS lights all came on last night. I assume it's the cold (if you could call it that), but it's not 85 degrees so I'll call it cold. All four tires are reading 38psi. Per the sticker, all should be 45psi. From what I know, these are nitrogen filled tires so adjusting the pressure isn't as easy as it once was with traditional air as far as letting a little out in the heat, and pumping them up when it's cold. What do most of you do in this situation? Just ignore the beacon and dinging, or adjust properly accordingly with nitrogen?