Water them once a month with distilled water or rain water. Feed it 1 fly or cricket once a month. Has to be a live one or it won’t trigger the trap. Grow them in sand and gravel. They like humidity high. You can achieve this a little by setting it in a very shallow dish of water and dome it in glass. A green house is nice too. If they die off a bit in winter they will grow back.
Late to the party lol. Distilled water is crucial. Tap water once can kill it. I feed mine dehydrated blood worms (can find in pet stores, sold as fish food). I rehydrate them with distilled water and feed the traps with a toothpick. Seems to work just fine, my babies are thriving!