Refractometer

Anyone else have to re-calibrate their refractometer every time the use it??? The worst part is I realized it after about 3 batches!!!

I check mine with water before every brew day, but it hasn’t moved since I first calibrated it.

Are there extreme temperature fluctuations between readings?

I check mine occasionally, but I haven’t had to recalibrate it yet.

+1 to the check with water method everytime. Usually doesnt need adjustment.

I’m not sure what the problem is…I keep it where it is about 62 degrees or so continuously…