Sorry to hear about your cat Batlord.
As for damp smells (apart from the closing of your legs obviously pointed out in this thread
), there are very few remedies for this problem. If you have uPVC windows in the room you can buy mildew remover and spray it on the windowsill but this will only stop the problem for a little while and not remove the actual smell.
To alleviate the smell, white vinegar in a small bowl is good. When you are out open a window. It may be cold when you get back but hot air versus cold air in the room intensifies damp smells so keeping alternating temperatures to a bare minimum helps.
Next instalment is how to cook the perfect roast chicken, fecking exciting I know but your parents will be impressed when you invite them around on a Sunday afternoon for Lunch just before you ask them for that loan that you have been putting off.