Our system drains out through 3 galleys but they are not draining very well during the wet seasons (no problem in the summer).  I am told by some people that using septic scrub on the galleys is not effective because it is difficult to get it out there where it is needed.  
The only other solution is of course to rip out the old galleys and out in a new leach/drain field.  Just wondering if anyone can shed some light on this.  I'm tired of dealing with septic service people.