Empty water drawer?

I have a indesit dryer and the water drawer has stopped filling up. The clothes were drying but now seem to just be damp at the end of the cycle.
All filters cleaned and checked.
Firstly where is all the water going!? And secondly, does anybody know how to fix this?
There is nothing about it in the manuels troubleshooting page.
Thankyou so much if anyone has any ideas.