Have a FORD FOCUS MARK 1 WHICH IS 19 YRS OLD. IN WINTER OR DAMP CONDITIONS THE CONDENSATION INSIDE IS EXTREME CAUSING DAMP PATCHES ON THE INTERIOR FABRIC. ANY IDEAS TO CURE THIS PROBLEM.

 

Condensation needs damp air and a lack of ventilation - so you need to identify where it is coming from:

1. Is it residue from wet feet etc? that is not drying out in normal use - use your demister more or crack a window open when driving to force out the damp air

2. Is there a leak somewhere? - feel around UNDER the carpets - do they feel damp or is there any evidence of water pooling or excessive rusting in the lower parts of the floor pan?

3. Examine windscreen, window and door seals very carefully to see if any have failed - you should be able to see tracking marks if water is regularly getting in somewhere, it can often discolour interior trim

4. Check around grommets and cable seals where they pass through from outside - especially in the bulkhead, boot and floor areas

5. Have a good old smell - damp causes mildew which will give off an odour

So basically you will have to do some crawling around investigation to track down the source - if and when you find a suspect keep looking - there may be more than one on an old car - good luck with that

Finally, when the cause is found - do something about it - it will only get worse

Have you got a sunroof? Check the drain tubes.

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Have you renewed the cabin filter at all?