More food = more waste. Even if the clean-up crew eats everything, they themselves are producing more waste. For the last 4 weeks you have been adding quite a bit more food than you had previously. In addition the anemone produces slime that it sloughs off. You have increase the bio load of your tank and you have to make some adjustments, until your tank can catch up.
Feeding your haddoni twice a week is fine, but an anemone that was sticky but isn't anymore is a sign of a problem. Since anemones are mostly water, that is usually the first place I look.
Disolved organic molecules seem to give anemones problems and most people don't have tests for them. Carbon does a pretty good job of removing them when it is new.
FWIW: IME, there isn't much you can do to keep your haddoni from eating fish like tangs, dwarf angels and gobies. The healthier the anemone gets, the more likely it is to catch something. There is no real evidence that nightlights, feeding more or getting aggressive clowns helps much.