Wet pulp

I've been having great success with this machine until today -- I've had it for about 1 month and have been using it successfully almost every day, juicing greens and fruit.
Today I tried it and most of the juice is being extracted along with the pulp. Virtually no juice is extracting and the pulp coming out is very wet. The machine is assembled the same way as always.
Do you have any ideas?
thanks,
Kate W.