Originally Posted by S/V Elusive
.. I use a contact cleaner about every fourth time - keeps it from acting funny
Thomas points out the first principle.
Electrical contacts must be clean
, to achieve a good & reliable low-resistance electric
Clean contacts must be sealed
. Contact reliability
will be compromised by various types of contact contaminations, as corrosion
products, particles (salt, dirt), polymers or carbon deposits.
Most robust connectors can be cleaned with an abrasive*; but an abrasive is not recommended for plated* contacts.
* Some connectors have a “delicate” electrical
plating (silver, gold, palladium,, tin, nickel etc).
Spray-on electrical contact cleaners are usually simply compressed air, with a cleaning
agent that evaporates, such as isopropyl alcohol.
Conductive or Dielectric grease is only applied after the contacts have been thoroughly cleaned.