Why does my Audi A1 make a screeching noise when I brake?

I recently bought a used Audi A1 and have noticed a loud screeching noise when I press on the brake pedal. It only happens occasionally and seems to get worse in wet weather. What could be causing this and how can I fix it?

It sounds like your brake pads may be worn out. This can cause a screeching noise when braking, especially in wet conditions. I recommend taking your car to a mechanic to have the brake pads inspected and replaced if necessary.