Yes, inner cover ontop of feeder, then outer cover. I would screen the inner cover hole to keep robbers out and allow for ventilation. If you feed alot condensation can become in issue especially on cooler days.
Also check the gap where the screen meets the plastic along the sides. On mine there was a large enough gap that allowed bees to enter once the syrup level dropped. I wedged in a small twig to close gap.
Also check the gap where the screen meets the plastic along the sides. On mine there was a large enough gap that allowed bees to enter once the syrup level dropped. I wedged in a small twig to close gap.