Hubscore is good, but not the "be all and end all". What are you going after, just points? Or readers? Or AdSense, Amazon ... income.
Will getting a 98 by maybe deleting your lowest score Hub really do you any good? Maybe that low scoring Hub gets you a few bucks every now and then, either directly or by someone going from it to your profile to another Hub of yours.
97 is great; don't sweat it. Or was the question to get even more readers? That works. ;-)