Waters Xevo TQD Overview And Maintenance Manual page 139

To avoid damaging the ion guide assembly when removing
Notice:
it from the source assembly, do not grasp the ion guide by its metal
lens plates. Instead, grasp the circuit boards on the top and bottom
of the device.
5. Carefully grasp the circuit boards on the top and bottom of the ion guide,
and remove the guide from the adaptor housing.
Cleaning the ion guide assembly
Source assembly
Ion guide circuit boards
TP03413
March 14, 2014, 715004387 Rev. B 139