It leaked, or it stopped working
On this page11
The specimen was in a bottle
A sample container has to be leakproof under pressure change and handling, and often sterile. This shelf has no specimen container, and a bottle that looks right is not one.
And it traveled
Which adds a pressure cycle and a courier. A specimen that leaks in transit contaminates the paperwork, the bag and sometimes the person carrying it.
The compounded preparation attacked the bottle
A flavoring vehicle, a cosolvent or a surfactant against the wrong resin. Glass is the default for anything uncertain and there are 103 glass containers here for that reason.
Or it attacked the liner
Which is the quieter version: the bottle looks fine and the cap is stuck, or the preparation picked up a taste the animal then refused. The liner is in contact with the product.
The light did the work
Many compounded preparations degrade in light, and a clear bottle on a windowsill is an exposure. 75 amber containers, and a cupboard is free.
The enzyme product died in the warehouse
Live enzyme activity falls with heat and time. A stain remover that worked on the bench and sat through a warm summer is a weaker product and nobody blames the storage.
The sprayer clogged
A suspension or an enzyme product through a fine mist orifice. The particulate blocks the nozzle, the client shakes it, and the pattern never recovers.
The trigger sprayer did not lock
Or nobody knew whether it did, because that is not in our data. For a product sold to a household with children, the lock is part of the safety case and it has to be confirmed with the manufacturer.
The dispensed liquid evaporated
A poor liner on a short course does not matter and on a long one it does: the remaining liquid is more concentrated than the dose assumes.
Test the way it will be used
Filled, capped, upright for the length of a course, on its side in a bag, warm, opened daily by somebody with stiff hands. Every failure here shows up in that test.