Need help with my head
We were all ''newbies'' at one time .... ask away.
Do a pump-out with several fresh waster flushes of the holding tank, then dump a product called "Odorlos"into the holding tank (flush it), after some time and several treatments if that doesnt work - leave the holding tank deck plate OFF when you''re not onboard. Use "Odorlos" regularly. Also, smell the outside of the connection hoses to see if the stink is permeating them; If so, replace with new hose or hard pipe with PVC. Stink will eventually permeate through most cheap rubber/plastic hose after a time.