i find that salt washes and that kind of thing work, nor does bonjela (for me anyway)
i get them ALL the time, i use anbesol which is just a stronger version of bonjela really, or to really kill them off put a blob of salt directly on them, or marmite. it hurts for about 10 seconds, but then you can't feel it for a good hour or so. good trick before meals so you can eat without pulling funny faces when food gets stuck on your ulcer!!