Had the same problem with mine...
2 hoses (bottom and side) came out eventually. Clips holding them in place were a bugger to get off.
The top hose came off easily but would go back in as it had become brittle...If you can't or don't want to wait for a replacement hose, just goto a decent cat spares shop like german and swedish where you can pick up some new hose and clips..
Add a bit a soapy water and it should just slide in...Don't overdo the water though..