Some users will wonder how to clear search history that keeps popping up when using Twitter.
Personally I think Twitter might be for Twits, - this may be true, except they call them Tweets.
Anyhow, you need to go to "Settings"/Applications, and search through your apps. Have a look at what Apps. are installed, and of course watch out for Twitter.
If at first you don't succeed, be like Robert The Bruce and keep trying, by using the three headings at the top of the screen.
These are for Apps. installed on the Phone or SD card, and I think one may be for "All Apps."
Eventually you will find Twitter, or it just be a stylized "T".
Touch it, and then go to "Clear Data". Touch it, and your search history is history, so to speak.