In article ,
Chris Hogg wrote:

The advantage of either soft soap or washing up liquid is that the
residue is not sticky and, if necessary, washed off with water. The
soapy water you used also works, but it's difficult to dissolve well
enough to spray, if its real (hard) soap. Most 'liquid soaps' are
detergents, with the same active ingredient as washing up liquid and
God alone knows how many other chemicals, at a much greater price.

There's this from Spain http://tinyurl.com/k6k3g68 which looks
something like it.

That is a ridiculously expensive soap for hands. This is the
stuff:

https://www.koppert.com/pests/aphids...gainst/savona/


Regards,
Nick Maclaren.