Assemble Carefully
I almost returned this flosser thinking it was defective.  The water tank must be tightly installed onto the base in order for the pump to draw in water and develop enough pressure to operate.  The tiniest separation will cause the pump to suck air and reduce the water pressure to almost zero.  Once I figured this out the flosser works great.  The instruction booklet would be greatly improved if it made this point.
Rating: 4 stars