The actual failure mode in fire cider is almost always ingredients poking up above the liquid, which is where mould gets a foothold. So keep everything fully submerged and push it back down when you shake it.
Bin it for fuzzy mould on the surface or on anything sticking out, coloured spots in green, black or pink, or a rotten smell instead of sharp and spicy. Yours smells right, which is the test that matters most.