Try using their own brands cheapest shampoo. They don't contain as many plastic ingredients that hold everything in and down. If it doesn't work then it isn't much money wasted.
Spent a fortune on karastace etc in the past, won't be anywhere near a hairdresser tonight, just wanted to pick some up, not sure which I would choose though....
Asda own brand not be a bit weak? Perhaps not. Will have a gander....
I remember someone asked here a while ago about what to use as she had a big build up of hairspray she couldn't shift. Lots of suggestions came through but she tried my suggestion of el cheapo and said it worked a treat.