seriously, ive tried all the sprays and gels, tried freezing it, used special gum piercers, no real success with any of them mate...
steamers? not tried, ive seen a machine for sale on here i thin k for about £600 which removes gum, if i thought i could get such a machine and it would do the job i would get one and charge a pro rata price on top of cleaning the carpet, is there such thing?