User blog comment:Leon Jung/I wonder if the Winx could use their old power?/@comment-10921179-20140423073044

They did once where in season 3 they didn't use charmix but it could have been because charmix was only temporary. The reason they haven't is probably because they're weaker in earlier forms but other than season 6 the trix always went back to witch form but It could be different for witches???