Surely not!

Are they really going to fly billions of dollars worth of kit through water ice? At that speed water ice must be very dangerous or worse wet. I hope the probe went into space with its pac-a-mac

I think that if it all gets warm enough for the ice to melt, then there are more serious problems than water.

AC2

They obviously decided that Cassini was dirty.

With the wax and polish, please.

The speed of the water jets are nothing compared to Cassini's approach speed of about 14km/s. At that speed anything as big as a grain of rice could cause big problems for the probe, but the mission controllers seem pretty confident that the water & dust particles are miniscule in size.

Do you really think that the boffins at NASA and the JPL would do anything even remotely risky with a multibillion dollar-, fully functional spacecraft that still has several years of active service left?

... like mixing English units with Metric ones in design of a spacecraft?

A wash and vacuum....