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Im 16 days into fermentation and my cap is yet to drop... should i be concerned?

My mash is extremely spongy and there doesn't appear to be much liquid below my cap... I followed the recipe as is and am in my third day of fermentation, is this normal?

first time distiller with a few questions, How long (Weeks) do i let my banana mash sit before distillation? Also at what temperature do i distill my banana mash, the recipe looks great cant wait to try it.