Blair Malcolm wrote:
My wife has the idea of cleaning the grouting in our shower with the aid of
a power washer

This will be messy, and is likely to remove some or most of the grout.


or steam cleaner.

This may work, but I personally wouldn't risk it unless I was sure the
grout and tile adhesive can stand it.


She has tried all the usual chemical cleaners which she finds labour
intensive.

If your grout is dirty/mouldy, regrout. It's not as long winded as you
might expect.


Any suggestions where I can obtain reasonably priced items and or other
suggestions for doing the job

Once you've regrouted, treat the grout with Lithofin MN to make future
cleaning easier.


--
Grunff