Read instructions! The assembly is pretty self-explanatory. Follow  the directions on filling the tanks. It works to remove dog hair very well! The fragrance is very pleasant and certainly eliminates the dog smell. To my surprise, the refills for the concentrate  and deep cleaner aren't expensive for the amount you receive.  My only criticism would be the tank size for the collection. It only allows for a small amount before having to empty the holding  tank.It works great! Thank you Influenster!