USB socket maintenance
I have intermittent connectivity when putting devices into USB sockets, as if there is a poor connection.
Can I / should I attempt to clean the external - easy / internal - difficult / visible surfaces of the 'contacts' ?
If so what with - i.e. purple meths, clear meths, proprietory contact cleaner, spray ? or stuff a thin rag inside and wobble it around ?
I've been cautioned against using a can of aerosol compressed air anywhere near a computer due to the possibity of damage due to static building up on the end of the thin plastic tube that these cans use, or suck dust off with a vacuum cleaner for the same reason, and was advised to go to the local garage and use their metal tipped tyre inflating compressor - with caution ! - and ensure that I was not wearing rubber soled shoes, but this seems a but like nut and sledgehammer advice.
I do use a small,clean, paint brush to keep dust off the keyboard but how does one keep the USB ports clean and serviceable?