I know only one guy who does this. His jeans look brand new except for the striations. IMO, though, drycleaning jeans is in the same category as ironing jeans - against their spirit. Just air them out thoroughly (full day on both sides in a well ventilated area) after steaming them in the shower before each time. If you're not convinced yet, drycleaning the jeans will take out some of the creases, and it'll take some time to wear them in again.