While AXS components can withstand pressure washing and submersion, each component should be treated the same way you would treat ball bearing equipped components such as a hub, headset or bottom bracket. That is, avoid blasting water directly at the seals between the derailleur and battery, derailleur pivot points, or at junction points between component sub-assemblies.
Do not use acidic or grease-dissolving agents on your electrical components.
Finally, we recommend removing the AXS batteries and covering the contacts with battery blocks before cleaning.