HP 28S is very loud when opening/closing

[cruff]

(02-02-2020 08:41 PM)striegel Wrote:  I suspect it may be risky to try something conductive like graphite, but how about talc or cornstarch?

Talc is likely to be mildly abrasive to the plastic and cornstarch could swell in humid conditions. Either one is likely to get into the LCD eventually.