The short answer is, do not clean your coins.
WARNING - There is no way you can clean a coin without damaging the finish and reducing any collector value it may have.
Some coin catalogues suggest that you might use a soft brush on copper or bronze coins and, that there are professionals capable of cleaning coins.
Since you state that your coin is a collector coin, go with the short answer and do not clean your coins.
The best way to keep them is in some form of a protective casing or packaging to keep dust, moisture and finger prints off them. Most coin dealers will sell something suitable for storing your collectible coins.
Keep it or sell it to a coin collector. These are not rare coins so you wont get much for it.
Keyboard Cleaner of amazon.com is the best product to keep my keyboard clean?
Is it okay to steam clean vintage gold coins
The best method is to keep the area clean. When the area is clean it will heal faster. Peroxide is a great way to keep a wound clean.
You can sell such a coin to a coin dealer or a collector. Dealers buy coins for as little as they can with the intent of reselling them at a profit whereas a collector buys them to keep in a collection for maybe years at a time. With that in mind you may get a better price if you sell to a collector.
fillter it is the best way
You can find old coins at antique shops, coin dealers, online marketplaces like eBay, and coin shows. You may also consider joining coin collector forums or groups where members buy, sell, and trade coins. Additionally, keep an eye out for estate sales or auctions that may have coin collections available for purchase.
we can keep our sorroundings clean by not gonna put trashes everywhere
Cleaning kits that come with cleaning solution and scratch free cloths are best. Covers will help you protect your PSP and help you keep it clean.
best is to keep clean cache, don't run unwanted add on's , keep clean ur registry
Basically, anywhere that you are able to keep them. They are an important symbol so its is best to keep them
a clean warm one!