Sounds like your plants took a shock and are working back. Did you throw the prolifera out? If not leave it. I have had my proflieras die all the way back to the roots just to come on strong after a few weeks.
Is the fan blowing on the plants or just circulating the air? Drosera do not like to much wind and will not 'dew' if there is much wind blowing by. This gives them a very haggard look.
It is good to meet you!