To enchant an object, have that object and a filled soul gem in inventory, then activate an arcane enchanter.
You cannot replace enchantments, nor can you add the additional effect perk to already enchanted items. It’s better to wait until you have a high Enchantment skill and the Extra Effect perk before enchanting good gear, unless you have the materials to craft another one.
To unlearn all enchantments, clear all ENCH items from the list and save. It is recommended to make a backup beforehand.
No. If an item is already enchanted with an effect, you cannot add another. Once you have enchanted, bought, or found a weapon with an enchantment, you cannot enchant it further.
Once an item is enchanted, it cannot be further enchanted with an enchantment table. However, you can combine two enchanted items or add a second enchantment from an enchanted book using an anvil. You can also combine the enchantments from two books into a new double enchanted book.
In Skyrim, however, charging is much easier. If you have a soul gem with a soul in your inventory, simply go to your item menu, select weapons, then scroll down to the weapon you want to charge.
It sounds like your enchantment skill is too low. Under the Enchantment skill tree, the first perk is called Enchanter. Spending Perk Points in Enchanter will increase the power of your new enchantments.
To start enchanting your weapons you will first need an enchantment table, which can be crafted using a book, 2 diamonds and 4 obsidian pieces. Once you’ve created and placed your enchantment table, simply right-click on it to open the enchantment interface and drag your item into the empty grid slot.
You can theoretically add any enchantment that is compatible with a tool/weapon/armor to the same item. The bow can have these 7 enchantments, although repair and infinity are mutually exclusive. So with an anvil you can have up to 6 different enchantments on one bow.
The more damage a weapon takes, the less damage it does. When their condition drops to zero, the weapon or armor becomes unusable. You can repair your armor and weapons by equipping Hammers and Pincers. The success of your repair depends on your weaponsmith skills and the quality of the tool.
If you reload a previous save long before your weapon was empty, all of them will be empty. I’ve found that to “fix” this all you have to do is use the potion and enchant another weapon. It doesn’t have to be the same weapon type or material or enchantment, just maximum power.