[wynne jones]

The question says strongest so this would be something in the ph 14 range. I think PB is only 11.

Enzymes make sense on this sort of job combined with something that keeps the ph up.

[markpowell]

Craxtex Champion from restoremate
Mark

[benny d]

Thanks for all the replies. 
A lot of food for thought!

Yes I just need something different that will really do the business.
We cleaned it a few months ago, but it seems it needs another good clean.

[Jamie Pearson]

Maybe they need the kitchen floor deep cleaned to slow the tracking out into the restaurant.

Enzymes are the way to go as the others mention.

Rinse them well if there is wool content as I am sure you know.

Enzall is the highest pH of the enzyme pre-sprays with the widest working temp and longest time range once activated.