Just popped to morrisons to do the weekly shopping and I recommended to buy some Surcare washing up liquid by a fellow window cleaner which apparently is better than ecover
http://www.mysupermarket.co.uk/asda-compare-prices/dishwashing/surcare_sensitive_washing_up_liquid_450ml.html
http://www.mysupermarket.co.uk/asda-compare-prices/dishwashing/surcare_sensitive_washing_up_liquid_450ml.html