Printed circuit board connectors (more often shortened as PCB connectors) are a type of electrical connector, made up of a housing and contacts which join sections of circuits together on PCBs, namely boards where conductive tracks for electronic components are printed....
There are a variety of PCB connectors and accessories best designed for specific uses. To name some, they include:
Cleaning is an essential part of maintenance for the good functioning of PCB connectors and electronic devices in general. Especially if not used every single day, connectors are likely to accumulate dirt and eventually corrode making their use no longer possible. Carrying on a cleaning routine once in a while enables you to avoid power loss and keeping on having good contacts, but you should also be aware what the right tools are in order not to damage the parts that get in contact with the circuits.