Dosey needle sticks

[Oldtimer]

Hello.
My Dosey TC3001-P swr needle sticks I think.
When I key the mic and set it to set the needle moves freely.
When I switch to swr sometimes the needle moves and times it dont.
Sometimes I tap on the top it will move .
Any thoughts.
Thanks

 

[freecell]

what's the temp in the room where the dosy is located?

 

[Oldtimer]

Around 70*

 

[scout943]

Dosey

Might be a bad or dirty switch. Try some electronic cleaner.