How to unclog a bathtub vent?

How do I unclog a vent pipe for a bathroom?

I own a home built in the 30's. My entire drainage system has been sluggish for about a month. Now it's totally backed up into the toilets and bathtubs. I snaked the line from the septic tank towards the house, then a bunch of sewage came along and drained into the tank. I thought the problem was...

I have tried a plunger, of course first. Then went to Lowe's and got a toilate auger 3' and tried that, still the toilate will not flush without me having to turn off water and let it SLOWLY drain out. Is there anything else I can try before calling a plumber? Thanks!

I live in a 2nd floor apartment. I used a clorox disposable toilet brush cleaner and it was accidentally flushed down the drain. Is there anything I can do to either retrieve it or can I try to push it down into a larger pipe. What do you advise. My landlord states I will have to pay a plumber to...