Brearley

Yes

Sometimes a few seconds sometimes 2 minutes but obviously the calibration is not sticking

Every few minutes

My prints were coming back from my lab great for about a year . I had my monitor brightness turned way down. I had some prints come from my lab too dark so I purchased a Spyder pro 5 and calibrated it. ever since I calibrated my screen will be fine then go really white then back to normal. I thought it was my screen so tried it with a brand new screen. Same thing contacted manufacturer of Spyder pro and they said probably calibration not taking due to problems with administer permission installing the software had my husband uninstall and reinstall , said that’s not problem , ordered some prints and still too dark. any thoughts?