All of them told me the exact same thing:
1. Scrub using a Rotary.
2. Follow with a light rinse.
No Liability from blowing out the grount that lost its' integrity, no absorption of water under tile to pop it loose, etc.....
Just a even clean!
Funny, on some other forums I read that "You need at least 1200 psi" (!!!)
Are you kidding me? Inside?
Hummm. for those who believe that or have tried that an were lucky, better increase your Liability Insurance because I do know someone who went through Hell trying to defend himself and his business. He paid dearly.
The JAGUAR MX-2 ETM @ cross-american.com