The mix: smoothie, not soup and not paste
The powdered diet is a complete food — protein, fruit, vitamins, and calcium already balanced in the tub — and your only real job is the water ratio. Start with roughly equal parts powder and water and stir to the consistency of a thick smoothie or runny ketchup. Too watery and the gecko laps up mostly water; too thick and it dries into a paste the gecko walks across without eating. Small geckos eat astonishingly little, so mix a spoonful at a time rather than a ramekin — a shallow bottle-cap-sized serving is plenty for one gecko, and small fresh batches beat a large batch crusting over in the enclosure.
Make the mix with room-temperature water and serve it at room temperature; there is nothing to cook, warm, or enrich.
Placement: the dish has to be where the gecko lives
Crested geckos are canopy animals, and a dish on the enclosure floor can sit untouched for nights while the gecko starves politely above it. Set the dish in a magnetic or suction feeding ledge partway up the glass, near the foliage and branches where your gecko actually spends the night. Keep the ledge in the same spot every night — geckos navigate by routine, and moving the restaurant resets their willingness to visit it. Offer the food in the early evening, matching the hour the gecko wakes and starts moving; a dish placed at noon has dried to a skin by the time dinner is on the gecko's mind.
The swap rhythm and reading the dish
Fresh mix goes in every day or two, and the old dish comes out at the same visit — the warm, humid air of a gecko enclosure sours the food quickly, and a soured dish teaches the gecko to avoid the ledge. Do not top up an old dish; wash it and start clean. Reading the dish takes a keeper's eye: you are not looking for an empty bowl but for lick marks — smooth scalloped trails wiped through the surface — plus droppings on the ledge or floor, which confirm the food is passing through. A dish that looks completely untouched for a night or two is normal; a week of untouched dishes from a gecko that is also losing weight is not, and that combination earns a vet's attention.
What not to add, and the insect question
Serve the diet exactly as mixed. Sweet additions — baby food, honey, jam, extra mashed banana — are the classic way keepers accidentally unbalance a complete diet, filling the gecko up on sugar while diluting the protein and calcium it actually needs. Live insects are a separate question: many keepers offer small dusted crickets or roaches once or twice a week for hunting enrichment, and many geckos thrive on the powder alone. Either way, insects are the garnish; the mixed dish is the meal. KinsLe's Care Teams lets you set the mix-and-swap days as a recurring duty with the consistency noted, so the gecko gets fresh food on schedule whoever is on evening duty.