Do not use toothpaste, it will swell up the sore, salt will cause more blisters (Doesn't work for me). I haven't tried the
bleach + water yet but after reading few of the comments here, I think it is useful before an outbreak, whereas using it after the outbreak causes an adverse reaction (Huge Lips). The fact of rubbing Ice on the sore is to ease the pain in case the sore is painful, especially good to do at the onset of a sore about every 10 minutes for an hr.
The ice kind of prevents viruses from the nerve to the skin.
Another good remedy for this is Aloe. Rubbing the juice from an Aloe plant on the sore also helps curing and
preventing sores in the future.
By the way, Vaseline will also help ease cracking and dryness but do not apply it on the sore or it will last longer. Apply the Vaseline after the sore is gone on the dry spots. Not to forget ppl, your diet and hygiene are also important! Consume lots of vitamin C (Grapefruit is great), drink lots of clear fluids, thoroughly wash hands to avoid other outbreaks, always replace toothbrushes and apply sunscreen (at least 15 SPF) on lips before being exposed to the sun.