Earlier in the year, our commodore personally came out to the ramp and scrubbed it down with a wire brush. That worked and worked well. But since then the wire brush has disappeared, otherwise our fleet would be happy to brush the ramp every several weeks or so.

Another thought is what I suggested. Get a couple of rubber treaded mats. If they stayed in the water they would become slippery as well. So, when we are not using the ramp, pull them up above the waterline to stay dry and unslimed. When we get ready to launch the Waves, just slide them back into the water.

By the way, we do not have a tide.
Rick