water in foam
One possible source of water entry is the pump-out hose for the toilet. This hose passes through the anchor locker floor and down to the toilet. A foam sealant supposedly prevents water from the anchor locker from leaking down beside the hose. Since the anchor locker floor slopes downward towards the drain hole in the bow, water should drain away from the hose. However, if the drain hole is plugged, and if water collects around the hose, it could penetrate into the foam floatation. On my own Sandpiper, I cut the foam away from the exposed hose in the anchor locker. I then cut a fiberglass plate (about sx inches across) to fit around the hose, and using good marine sealant under the plate, I screwed the plate down to the anchor locker floor. The sealant squeezed up around the hose and down onto the foam floatation below, thus sealing out any water. This may be a possible solution for your problem. Of course, you will still have the present water in the foam. I think this is a closed-cell foam so it may be a problem of drying out the water that has accumulate around the foam. Perhaps you could fit a small inspection hatch (or two) that would allow you some air circulation and possibly allow you to drain some of the water.