Interesting note on one particular collodion salt, Waldack no.2, that remained untouched for about 3 months.
It seems like crud of collodion salts formed on the walls, and it returned back to straw colour.
Tested in silver bath and it does not sensitised at all, as the salts is no longer in the collodion
Alongside to compare, is New Guy collodion, all bloody red in colour which was made at the same time, it produced beautiful contrast but slowed down 3 stops. (About 12 min at F6; EV 8.3)
A plate was made with New Guy yesterday and seems to work fine as the plate shown below (shot from the phone, but in reality contrast and sharpness is good)