it's inconsistent. when i set it up on friday and used it over the weekend, i couldn't read the text on my iphone or the keys on my keyboard. i'm using it at wo

it's inconsistent. when i set it up on friday and used it over the weekend, i couldn't read the text on my iphone or the keys on my keyboard. i'm using it at work right now, and have no problem - it's extremely sharp. not sure what the variable is - but hopefully something they can improve.