How can I troubleshoot my Audi A2's faulty air conditioning system?

I've noticed that my Audi A2's air conditioning is not cooling as effectively as it used to. What could be causing this issue and how can I fix it?

Start by checking the refrigerant level in your air conditioning system. If it is low, you can try to recharge it yourself with a DIY kit or take it to a mechanic for a professional recharge. It's important to note that low refrigerant can also be indicative of a leak in your system, so keep an eye out for any signs of leakage.

Another common issue with faulty air conditioning systems is a clogged cabin air filter. This filter helps to trap dust, pollen, and other pollutants, but can become dirty and clogged over time, reducing airflow and making your AC less effective. Check your cabin air filter and replace it if necessary.