Our final hybrid cleaning approach implements chemomechanical cleaning as shown in Figure . The propeller and pH probe are first immersed in the solvent bath at the base of the wash station. This causes residues to swell and lose their mechanical integrity. Subsequently, the propeller and pH probes are raised to the level of the pressurised jets where the softened residues are mechanically dislodged. The propeller is rotated at full speed during washing, adding shear forces for improved cleaning. We found that the wash station was able to eliminate all traces of residue from the probe head for the range of formulation viscosities used in this experiment. Full control of washing parameters is achieved with two diaphragm pumps with speed controlled by PWM. The inlet pump regulates the jet pressure, while the outlet pump controls the solvent level in the bath by varying the solvent drain rate. Varying these two flow rates allows us to switch between soaking, spraying, and drainage modes with minimal actuation, reducing control complexity. Finally, the non-contact washing process means that no parts of the wash station are in physical contact with residues and thus the wash station is self-cleaning during the course of the experiment. Successfully implementing thorough washing of the probe head was integral to the self-driving nature of this platform, enabling fully automated titration. As IPA is a volatile liquid with a flash point of 12°C and lower flammability limit (LFL) of just 2 v/v%, we were particularly concerned with releasing flammable IPA vapours. Therefore, it was ensured that the mounting piece for the pH probe and dosing needles completely covered the opening of the chemo-mechanical wash station whilst in operation and that the outlet pump was used to fully drain the wash station at the end of the washing cycle, so sufficient flammable vapours to reach the LFL could not be released.