def clean_for_hashtag(text):
    """
    Strip non alphanumeric charachters.

    Sometimes, text bits are made up of two parts, sepated by a slash. Split
    those into two tags. Otherwise, join the parts separated by a space.
    """
    tags = []
    bits = text.split('/')
    for bit in bits:
        # keep the alphanumeric bits and capitalize the first letter
        _bits = [_bit.title() for _bit in bit.split() if _bit.isalnum()]
        tag = "".join(_bits)
        tags.append(tag)

    return " #".join(tags)