Why does google spider my robots.txt file several times a day?

[kylah16]

One one of my websites Google crawls the robots.txt file several times a day which doesn't actually have anything in it but only crawls my index page between every 1-3 days although I update it every day. Why is it doing this and how can I switch it around!

[SpongeBob]

Your Robots.txt files tells Google what pages is is/isn't allowed to access. It'll check that regularly as if you change it you'll want it to take effect quickly.

[kylah16]

Is there anything I can put in it to tell it to spider my home page more often?

[Donk]

If you create a Google sitemap. You can set the "priority" of your home page higher than your other pages.