Index getting currupt ocationally, Have to Delete and Re-index every day

Something goes wrong in my index every time. Some times when I search for some keywords my search result page is empty, But I know there is results for these keywords. Every time when I come across with this issue, I have to delete the search & solr index and re-index again. Then it'll fix, but again in a few days it'll mess-up the search. At-least is there a way to make this process automatically? I mean Delete and Re-index once a day, something like that.