I have just found a user who has posted about 70 questions on this site, all very short with missing punctuation and so on, and with very poor titles. Several times questions have been closed, and sometimes the user posts the same question he/she posted before. Despite the closures, the user has a net positive ~300 reputation.
I have spent the last 30 minutes editing his/her questions and left a few comments telling him/her to check out "How to ask a good question" on meta, etc. But I am worried that given the user's history, he/she will not learn from my comments. I would like something to be done so that we do not just have consistently more bad questions from this user. What else can I do?
(I expected that this has been asked before on meta, but I can't find a duplicate.)