The most useful weapon against Horcruxes, seen so far, has been the venom of a Basilisk. Harry used the fang to destroy, unbeknownst to him, the Horcrux that was Tom Riddle's diary. The venom would then go on to power the sword of Gryffindor as well as used to destroy Hufflepuff's Cup via fang.
This was only achievable as basilisk venom was an extremely destructive substance capable of destroying Horcruxes. Although beyond repair when exposed to this venom, living Horcruxes could potentially be saved through the speedy administration of phoenix tears, an extremely rare substance.
Horcrux-ification is a very dark wizardry, so it requires a very strong means-of-magic to destroy one. As it took a very strong move, i.e. killing someone, to get your soul ripped, equally strong weapon was required to destroy that piece of soul.
It is certain that once a horcrux is destroyed, the fragment of soul within it dies. Like, forever. If a normal person creates a single horcrux and if it gets destroyed, then that part of his soul is gone forever. It is certain that once a horcrux is destroyed, the fragment of soul within it dies.
A Horcrux can be destroyed with Basilisk Venom, Fiendfyre, or the Killing Curse. The Sword of Gryffindor was useful in destroying Horcruxes because it was imbued with Basilisk Venom when Harry stabbed the monstrous snake in the Chamber of Secrets. Basilisk Venom destroyed the ring, locket, and Nagini.
If you need to “hold” freshly fried food for a short time, place it in a single layer in the oven at 200 degrees Fahrenheit. Refrying already fried foods is generally not a good idea, but it can work for fried chicken. Cool the chicken completely in the fridge overnight and then refry for two to three minutes.
Put parchment on a baking sheet and put a baking/cooling rack on top and let the chicken cool there. Otherwise, it might get soggy. Technically, you could use paper towels under the baking rack, but I like to use parchment instead of paper towels in case I want to oven-finish it.