My Waterpik started to go down hill a few months ago but it was still usable. Now it's making horrible grinding noises that I just can't stand anymore. It's time for it to go under the knife...
As you can see, on the left is the fully assembled Waterpik. To begin the disassembly, remove the tip then detach the water reservoir from the main body.
Gently squeeze the reservoir cap and the top of the body to snap out the blue part.
The reservoir as shown separated from the body.
Remove the swivel cap using a flat head screw driver blade. It will pop out with a little prying all around.
Here is the end without the swivel cap.
Remove the two screws on the bottom of the body and slide the gut of this thing out.
Here is the gut separated from the body's shell!I found out that the pump gear was just a little worn down and needed to have something that push it to the motor main gear. I added a little bit of tape and hot-glue to serve as a backing to the pump bracing arm. This will help push it against the motor main gear when assembled.
Here is the closeup of my fix! It works fine once assembled. Before assembly however, I put some Vaseline on the gears for extra lubricant and some on the motor housing and electrical area for extra insulation against moisture.
