What Doctors Don't Tell You - 14th November 2007 carried a very comprehensive item, taking the lid off dishwashing liquids:
"Dishing the Dirt on Dishwashing Liquids"
http://www.wddty.com/07521651368122450487/dishing-the-dirt-on-dishwashing-liquids.html
I'd always thought that buying 'eco' was sufficient to avoid the evils of the petro-chemical products but, guess what, it isn't. Apparently, harmful surfactants can be found even in some respected 'eco' products.
If this article is to be believed, the only product that looks to be OK is:
'Dishmate Washing-Up Liquid". (http://www.ecos.com/ and http://www.greenbrands.co.uk/)
I mention the name, despite being very 'anti' the promotion of products, simply for information for the reader.
Apparently, the 'offender' in other products (even some 'eco' brands) is SLES (Sodium Laureth Sulphate), a potentially dangerous surfactant.
[Why not take a look at www.alternativevet.org , while you're here?]