I can't remember what the ratio was, it was a good 4 years ago, but like I said, the job was a real minger, the worst I have ever seen. I would turn it down these days, unless they were willing to pay. The house was empty and I tried pb with citra boost upstairs to good affect, but I ran out of citra boost for downstairs so tried a mix of pb with Trafficlean as it was a last resort clean anyway. Trafficlean is a decent prespray on it's own anyway, I used to use it before I discovered pb and it always did a great job.