48g over-zealous cleaning

[HP67]

I find Simple Green (the colorless variant) does a great job on all kinds of electronic device housings while being very gentle.

I use it on hifi gear, HP calculators, etc. and have never had a problem. I buy the straight Simple Green (undiluted) from a local distributor and cut it 4/1 with tap water (or distilled, depending on application). Sprayed on a microfiber rag and applied to HP keyboards with the device upside down, it cleans very well and does not seem to leave any residue.