Weird shizzle going on with my temp gauge

The temp sensor is generally in the thermostat housing.

Pulled the connection off today and gave it a clean and a bit of WD40.
Seems to be working now. Thanks for the tips.
Boot and wire looks a bit knackered though.
Might add some 'lecky tape.....


Tip tip tip......tap tap tap....

Thanks for thiss info guys,mine started playing up,will try and fix if not will replace.