We buy our washing up liquid through our company, as home is our business address and company premises it can be tax deductable. But even though because of this, it is not coming under the remit of the Challenge, ie not being bought with the other shopping but purchased instead from the farm supply shop, I still do not waste a drop.
I refill the smaller bottles from the large one ....
... and when the large one is finally empty (each one lasts us about a year) I put a small amount of water in it and swish it all around. This 'swish' liquid gave me enough pot washing power for an entire weekend.
And when the small bottles are completely empty I fill them with water and give it a shake, I get one wash from the water and then I drop the red top into my next bowl of water for washing pots and let all the washing up liquid 'gunk' soak out giving me another bowl of sudsy washing pots water and a nice clean bottle and top ready for refilling. I waste nothing.
Oh and forgot to mention of course the washing up liquid itself is diluted!! I fill the small bottle up to about two thirds and then top up with tap water. When we lived in southern England I could get away with one third washing up liquid and two thirds water but here with different water the quantities have reversed.
Today is another No Spend Day.