We had the same problem. We were told to put him on solids at 4 months as this would help settle it... it didn't. Then we were told to try losec... didn't help.

Next we were told when he turned 1 and/or started walking (so being upright more) it would decrease... it didn't.

Basically he grew out of it at about 18 months (it did decrease for a while then stop and start on and off). It's not fun, and you spend a fortune on washing detergent and wasting water, but we didn't really find anything that helped. I think it just stops eventually...

Sorry - not much help am I?