Sundew Question

Sundew Question

Background: I bought this Sundew at Lowes a month ago hoping to try something new & help a knat problem. Conditions: Distilled Water used & kept wet when I check on it...not on typical "watering day" schedule like my other plants. Kept on windowsill during day & covered with plastic "cover" during some cooler nights, but uncovered next morning. Questions: How do I know when to "repot" this plant? I read that "These plants are in a continuous stage of growth with old growth dying and turning black as new appears", so it always looks "happy" but I don't know when it's time for a change. Will keeping in original "pot" help create flowers? (I read spring & summer are their seasons) In my opinion, this plant has caught more than what I ever expected it too...could it be eating too much? Is there such a thing as too much?
PS: You are always welcome to visit my garden site.
Some flowers growing in our backyard

Some flowers growing in our backyard

My Messy Room

My Messy Room

Meloncholy December Beds

Meloncholy December Beds

Nothing to guess about this time!

Nothing to guess about this time!

The last roses

The last roses

Containers without flowers

Containers without flowers