The only reason I can see is that businesses no longer see the...

The only reason I can see is that businesses no longer see the need to continue using a product that claims to protect for 30 days against a virus (and is more expensive). As the world is starting to live with the virus, many have probably switched back to cheaper/more commonly used sanitizers that were used before the pandemic. That's why Zoono need to diversify (e.g. animal health), but that will take time. I can't see ZNO rebound significantly in the near future unfortunately. SP will probably go side ways from here on and every rebound will be sold into by those who have bought in too high.