I rented a 100 foot snake yesterday but have had no luck getting it in. I've watched the plumber do this before, but I wanted to get out of the deal a bit cheaper. So I drop the snake in and try to feed it into the mainline, but I have a "T" shape down there. I can not get the snake to bend enough to go into the hole. What can I do? I gotta return this machine by 12 and it is 9am now.