how can i fix my hotpoint ctd00 condenser dryer?

i had recently noticed water on the floor to the front of the dryer last week i took a look inside the filter to find it covered in water as was the whole of the filter housing i think it has stopped condensing into the removable tray at the top please could you give me an idea of what is wrong and how to fix it as i dont know which part does the condensing regards danny