Waters Xevo TQD Operator's, Overview And Maintenance Manual page 135

Caution:
ensure that the bottom of the assembly is not in contact with the
bottom of the glass vessel.
3. Use the hook to carefully suspend the ion guide assembly in the glass
vessel so that the bottom of the assembly does not touch the bottom of
the vessel.
TP03412
4. Add 1:1 methanol/water to the glass vessel until the ion guide assembly
is immersed completely.
5. Place the vessel in the ultrasonic bath for 30 minutes.
Caution:
clean, chemical-resistant, powder-free gloves for the rest of this
procedure.
6. Carefully remove the ion guide assembly from its vessel, and blow-dry it
using inert, oil-free gas.
7. Inspect the ion guide assembly for persisting contamination. If
contamination is present, do as follows:
a. Use the wash bottle containing methanol to rinse the ion guide
assembly over the large beaker.
b. Blow-dry the ion guide assembly with inert, oil-free gas.
To avoid vibration damage to the ion guide assembly,
Hook
Rear circuit board
carrier
To avoid recontaminating the ion guide assembly, wear
Cleaning the ion guide assembly 4-59