The wetness of the pulp depends on:

• the consistency of the fruits and vegetables used
• the amount of fibers (they can block the mesh holes of the sieve so that the juice flows into the pulp container instead of the jug). 

To prevent this

• clean the sieve in between
• the feeding tube slowly, piece by piece.
• Don't exert too much pressure on the pusher
  
  Note: Even if the pulp still feels a little wet, the juicer has already
  extracted the maximum out of the fruits or vegetables used. However, this is the case
  with all juice extractors.