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If debris is still lodged inside the cleaner, you must remove the flapper. To do this you
must take out the four red plugs in the foot pad. These are found on the bottom of the
cleaner. They can be removed using a flat head screwdriver. Underneath there will be four
screws. Unscrew them and remove the foot pad from the main body. Once removed
there is a plate. Remove the single screw from this plate and slide it out of the main body.
This will expose the flapper and it can be pulled out.
Remove any debris that may be inhibiting the flapper. Once dislodged insert the flapper
back into the body. Slide the plate back into position and re-screw it into place. Then
re-install the foot pad. Make sure that all are securely in place.