Grundig Radio 1957 model 3088 (Algemeen)

door rene , Castricum, 10.11.2016, 08:02 (2937 dagen geleden) @ Pandu Rajan

Your problem is a common problem.
there is a risk that you will do more harm to your radio when you will remove the terminal plate.
in this situation there is no possibility to clean this contacts by mechanical brushing.
a solotion could be cleaning or spraying with a syringe with a long needle if you can reach this contacts from the side.
the chemicals that you should use have to be agressive enough to clean the contact but without desroying other parts.
so you must only spraying this contacts (if possible) , a chemical that you can use , if available in your country is trichlorethylene , this is a toxic chemical but will do the job.
good luck.