[fatcatzzz]

We are fulltime and travel with one of these "SEWER JETTER - Complete and Ready to Use - Flexible Steel Braid (50 FT for Gas Pressure Washers)" (bought on amazons website). I just go to local rental yard and rent pressure washer for half a day. Usually about $50. Do this twice a year have not had any problems like we had before using this. You would not believe the stuff that comes out after just six months of use.
If you purchase one make sure you get one with small nozzle on the end as the larger ones can get stuck.