You should stop doing Hanon exercises.
There is no worse thing to devote your practicing time to. Piano exercises should not be done in order to acquire a better 'tecnnique', since technique is not something that begins at level 1 when you play the piano and can improve through different levels. Technique simply defines what is needed in order to play a certain piece or passage.
The right way, however, to acquire the technique that is needed to play that certain piece or passage, is by playing through it, see where you make mistakes, look for the reason that you make those mistakes and then come up with a solution to overcome those mistakes. That process is something a teacher should help you with (if you have one) or you could ask the members on pianostreet.
BW,
Marijn