Very Thin Negative

Are the original chemicals liquid or powder? If liquid, the developer might have expired. If powder, how did the developer look before you mixed it up?

Is there any chance that you put the film in the fixer before it went into the developer, or that you missed the developer entirely? If so, that would certainly explain it

Original chemicals are liquid, 2 years old and never opened, however storage area was subject to temps ranged from 70ish(?) deg to just above freezing in my pantry (think I just figured it out, bad storage). I was very careful to keep dev and fix separate. A little more info: some frames do show good detail and some look nealy blank. I'm 99% sure I did the chems in proper order. The camera was either a Nikon N70 or N60, both cameras were used on the same trip with both color and B&W film. Lab processed color was beautiful, so I rule out cameras. Possibly my DA and old chems. Just can't figure out how half the strip seems to be good (not really dark) and the other half really thin. Chemicals did have a strong smell tho, not overpowering but not weak.