I'm at 35 psi cold as well, and I do check often with an accurate gauge.
I'm also still on the OEM Bridgestone tires, and they have 18,500 miles on them.
I purchased lifetime alignments at Firestone, so I have had maybe 10 (!) alignments so far, some of which were at different locations to make sure the numbers were the same on different machines. And they were.
I feel like I've tried everything to fix this issue. Perhaps the easiest move--and my next one in a few months--will yield an improvement: getting new tires.
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