wireless printer reads offline on multiple computers but is on.

I have a c2665 dnf printer I have it connected wirelessly to multiple computers and none of them can print to it even tho the printer is on. I have had this happen before at the end of the day but never all day like currently. I have tried turning the printer on and off again but that isn't working. The printer is connected to the router and even the router recognizes that the printer is connected. I have cloud printing on 1 computer, the other is through a complicated system. It will print if the computer is hooked up through USB. Please help I need to be able to print.