For the past week or two, the message "WIPER - PRESS ENT KEY" will be flashing on the screen when we come in the office in the morning, and occasionally during the day. I press enter, the station moves a little, and it goes back to sleep. I am guessing there is some sort of error with the wiper, so I have cleaned all of the sprockets & other moving parts as throughly as I can and replaced the wiper with a new one. It doesn't do this EVERY time it cycles on, but it seems be happening more frequently. The printer works fine when it is running and this only seems to happen when it is off and cycling on every hour or so. I'm worried that it is sitting at night waiting for someone to hit "enter" and not cycling like it should. I'm not ready to buy new heads yet, so has anyone had this problem??? Thanks is advance for your input.