Check out the environmental requirements for your machine and make sure you are within spec. This will greatly reduce static in the room overall. They have those specifications for a reason. You will still run into issue though. The above solutions are great especially Andy D's lol. I have also seen people use dryer sheets to rub down the material and reduce static. If the printer is on carpet, it shouldn't be, you can mix a solution of about 1 to 6 water and fabric softener and spray it around the floor around the machine which helps a little. Check out if Oce has an ionizer accessory. Mimaki uses a device that rides along with the gantry "unstaticizes" the material before it gets printed on and it seems to work great.