Just realized my expensive pH meter was way off for months
I dropped $120 on a fancy digital pH meter for my kimchi and sauerkraut batches six months ago. Thought I was being scientific and all that. Turns out the calibration solution I bought was expired - it sat on a warehouse shelf too long I guess. My last five ferments all came out weirdly sour or flat. I spent 30 bucks on vegetables every week (you know, cabbages, radishes, ginger) so that's like $600 down the drain basically. Anyone else have a calibration horror story?