Thank You to the Internet.
This is an FYI:
Stumbled on another site discussing this issue, someone actually phoned the manufacturers and they recommended hot (hand wash hot) water mixed with some washing up liquid.
I used it, it worked a charm, took me about 15 minutes to clean the entire mess.
FunkyDude had some fun and I learned that 10.5 month olds can climb to get to things they really want.