So I have a mechanical keyboard and I have a maintenance question: I'm noticing that some keys on the left hand side have started to develop a slight tendency to rreeepeat or – in the case of the control key – to not activate. What's the recommended procedure, now? Pull off all the keycaps, pull out all the switches (?), use the vacuum cleaner to suck up hair, dust and whatever else lives down there, then reassemble? No lubricant required? Can the switches stay in there?