I've never used one but I have used Simple Green, works a treat!
Automatically Appended Next Post: Also, just remembered, one of the
UK users posted a review of this product a few months ago, absolutely raving about it. I noticed your
UK flag and it made me think of it. He did mention that it is quite pricy however you can reuses it.
Hope it helps.
http://www.biostrip.co.uk/applications
James