Sail Cleaning Solution

I have one year old Mad Snug sails, and love love love them.  Being a lazy sailor and sail quite often, we leave the main sail on the boat, and just roll it up suspended from the boom by 4 wide sail ties.  After 9 months the lower 3' of sail developed some grungy looking gray dirt with some tiny black spots in this lower area, which is exposed to the air somewhat.  I guess I should say that we have a full boat cover that goes on.

I was hesitant to try bleach, etc.  Instead laid the sail down on the carpet, and used a slightly damp magic eraser, just water.   With just a gentle rubbing, all the grunge came off on the magic eraser, which you squeeze out under the faucet.

I realize that magic eraser is just melamine, a mild abrasive of like 3000 grit.   The sails now look brand new.  One thinks that leaving all that crud on the sails tends to reinforce small creases, which are not good for sails.

I plan to repeat this every 6 months.

Hello :  I see you have used the Magic Eraser to clean your sails, I was wondering about this. It may be fine but it is an abrasive and I would think that is not what you want to be doing to your sails on a regular basis. As for it only being made of melemine this is not quite true. There are chemicals included that P&G does not list and would have you call to obtain them.

This from a website:
"So what are those other compounds? Melamine foam is made of formaldehyde-melamine-sodium bisulfite copolymers. We know, that's a lot of big (and kind of scary) words. But those ingredients form the foam sponge, and at the microscopic level"

Again this does not mention the chemicals found in the sponge. I can attest that there is more than just melemine as I once purchased knockoff magic erasers and they were virtually useless at removing any stain or marks. Just a heads up.