Epson AcuLaser C9100 Reference Manual page 242

2. Hold the waste toner collector and draw it out as shown
below. When drawing out the waste toner collector, firmly
pull it since it has a drag resistance. Take care not to pull it too
strongly as it could cause you to fall down.
Note:
When placing the waste toner collector that is removed, stand it on
a flat surface as shown below to prevent the toner content from
spilling out.
242
Maintenance and Transportation