I am a part-time supervisor working on the sort isle after being moved from running an unload belt. However, I have a bit of a problem. There is an extremely lazy employee that missorts on purpose, purposely gets in other peoples way, and will not go where I ask him to go. He has filed a grievance against me accusing me of singling him out for being on his phone... The irony in it... But he is on his phone non-stop through the entire shift. I usually don't mind if its a quick text here and there just as long as they don't have the phone in their hand longer than 15 seconds. I am wondering how I deal with this. I was thinking of writing everything he does wrong such as not obeying directions, or missorting, or playing on his phone in a journal and reporting it to management and our local once I have enough "evidence". Normally, I don't care if someone is lazy, they dig their own grave and I send them home and I get rid of the problem, however this employee will never go home and stays the full shift fiddling around on his phone or spending forty minutes in the bathroom. Any opinions?