I'm not sure if you have a product called Napisan where you live, but just soak it over night in a bucket of water with a capful of this, then wash well.
this brings me back to my childhood and school fetes, where inevitably there'd be someone selling rice crispie cakes. I seem to remember the melted marshmallows was the best way to go about it, although it might be a bit sweet for me now!
When I lived in Paris, I used to have Nutella crepes every week. I agree that it can get a bit sickly, but in moderation, mixed with bananas, strawberries or other fresh fruit it's delicious!