Hello,
Regarding the pressure sensor device, there are some special considerations you should be aware of in case you want to wash it.
Any cleaner that enters the sensor pressure opening may have adverse effects on the device - especially if they are submerging the device in alcohol. So, sealing the access hole on the part with kapton tape is absolutely recommended. The use of clean RO water with a maximum water temperature of 145F is not an issue. I would recommend you to take a look at the following application note as reference; it includes some information on cleaning:
Soldering Recommendations for Pressure Sensor Devices
http://www.freescale.com/files/sensors/doc/app_note/AN3150.pdf
Hope this information will be useful for you.
Have a great day.
Best Regards,
David Diaz.
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