That takes me back, "1001 cleans a big big carpet, for less than half a crown" I suppose the carpet would be luxury you can afford from Cyril Lord.Hey, you're speaking to the lady who has a bottle of 1001 carpet cleaner in the cupboard....and the price sticker says 1/11d
It still works, I just use a tiny wee amount to clean the doormats ....it belonged to my MIL and she's dead over fifty years, so heaven know how old the stuff is.
Modern stuff is carp in comparison, and I'm down to the last half inch of the stuff !
You could try a pinch of the baking powder in hot water, if it bubbles then it's still good