I have to put my sky router in the freezer from time to time as it's basically fooked!!electronics respond well to cold,we've moved the router now onto the tiled floor which sinks the heat off nicely,well much better than the hall table we used to use.

As he said the bags only to prevent moisture.

Used to be a common problem but the other way around on astra gte's water ran into the ecu and caused it to fail.

Couple of hours on the radiator via a towel fixed it no probs,my mate had a free Gte years ago due to this!