If you've already got a spray bottle, then save on some packaging with the Bike Wash Concentrate from Weldtite's PURE range.
This 200ml Bottle will make 1L of bike wash.
If you want a spray bottle - then you can get the Weldtite Pure pre mixed 1 Litre bottle here
This will get your bike looking like new! It's completely acid free but still has the power of regular acid based cleaners.
Safe on paintwork!