First, you should speak to your landlord; they can help you find the problem. If the issue predates your arrival, you should be able to disprove that you have been the cause. The main thing that you should do, though, is looking at the key areas. Look for things like behind your radiators, and in appliances, especially on rugs and carpets.
It could be a pet odour, it could be something stuck in the carpet, or it could be damp. Either way, hire a local service offering carpet cleaning in Southend on Sea. Get a professional to clean it for you and see if that gets rid of the issues. Your landlord will hopefully meet you halfway regarding the cost of clean-up, though don’t hold your breath!
