Keeping cast encased arm clean

[Lavenhamluvvie]

My 7 year old broke his arm at the weekend and is now wearing a plaster cast. I know that the golden rule is to keep the cast dry, and it seems there are various ways this could be done. But how do I ensure that his hand is properly washed-especially as we enter swine flu season? I know there are the "goo" gel soaps around but I'm worried that will also cause the cast to go soggy around his fingers. Does anybody have any tips?
Guilty (didn't take him to A and E until 48 hours after the accident) of Guildford

my daughter is in a cast too, I use a soapy facecloth to do the fingers sticking out, does the job.

the gel soaps irritate her skin and leave a residue, so not ideal for us.

also waited 48 hours, don't feel guilty!!

Many thanks. That's what I'm doing. We bought one of those cast covers online which was delivered next day and that is a big help for bath time. Hope your daughter's better soon.

We had Limbo Bags for DS's fractures - they are great.