How can you clean your sink effectively and relatively safely? After all, we get it from the seabed covered in silt and algae, with a limestone coating...

Initially they are like this

And we want to have such

Plaque on the shell dissolves well in vinegar. You can lubricate the rapana with vinegar essence (70%) and rinse off with a brush after ten minutes. Or you can soak it in vinegar for several hours and also clean it with a brush.
You should be very careful with vinegar! The shell dissolves in it! You need to carefully monitor the reaction and wash it off at the right time!

Another method that was found on the World Wide Web is to soak in a chlorine solution. Hold for as long as possible until the top layer of the shell begins to rub off with your fingers.

Personally, I have tried both options.
1. I don’t have vinegar essence, I just poured vinegar into a jar and put a shell in it, after 3 minutes it fell into the hole). I got curious and didn’t take it out; after a couple of minutes the top curl simply melted before my eyes! An amazing sight, pure magic, I advise you to watch) After all, the shell is very thick and durable, but then it just disappears..

2. Soaked the shells in a Domestos solution. They lay there for 4 or 5 days, the top layer (and they were very dirty!!) dissolved and wore off, as promised. But! After drying, the shell looked like it had been painted with white paint....
I think that if you open it with varnish, the color will appear...

An even bigger problem with shells is cleaning the inside. One way or another, a shell is a living creature and if you take it out from the bottom, it often deteriorates and an unpleasant odor appears.

To be honest, I don’t know, I’ve never had to clean the top part, but I’ve encountered problems with the inside. In the summer, when we were relaxing in a camp by the sea, we put the shells we found in an anthill for a couple of days. They ate away the entire inside and all we had to do was wash it well.

The following methods are currently known, although I haven’t tried the last one:
1. Using a special knife (a long process, I tried to do this with an ordinary knife).
2. Freeze the whole shell; frozen meat comes out well.

There were no problems with getting the insides out at all, but with the consequences....)
They boiled my shells, but the inner surface was a little cracked...
They say that after freezing everything really separates well...
But those who caught the shells didn’t know the last method... Now I’ve cleared the moss from the rapanov, they are so white and clean... BUT they stink terribly!
Moreover, half of the shells don’t have rapana inside, but they all stink..
The smell clearly comes from the outer ear of the shell, which is near the entrance, it is large and mussels lived in it, that’s why it stinks... I can’t get them out of there, no matter how much I use knitting needles, an awl and tweezers.

Here are my rapanki lying on the street, in the rain for a week, but they still stink, I feel that they will never get into the house (

My sister advises to open it with varnish, and just pour varnish into those stinking ears to block the smell, like you smoke, will anything come of it?