I'm not trying to offend, but maybe you should take a firearms class. I don't know anyone whobuys a used (or new firearm for that matter) and doesn't give it a proper lube and clean. Not only are you cleaning but it gives you a chance to inspect the firearm. I see a lot of rushing and little patience from you and I think that's where you're running into an issue.
Take the advice these fine people have given you. Before I ever request advice on a malfunction I try a different magazine, clean the firearm throroghly, inspect it, read the manual/look at exploded pictures and sometimes watch a video.
What are your cleaning tools comprised of? Why are you cleaning with transmission fluid? That's not going to accomplish anything, you're trying to clean first, not lubercate. Grab a can of Brakefree, apply generously, let sit for a couple of days, read the manual and watch a couple of Youtube videos while you wait. Let your Breakfree/Hoppes/Whatever cleaner you choose what a chance to soak and loosen the grime/dirt/carbon etc... Assemble your rifle and perform a function test with Snap Caps or Dry Wall anchor.
If then you still have problems, come back and ask. It's not worth taking to a gun smith yet.
Again, I'm not trying to be condisending, but I think you would benefit from a basic firearms class and some patience. I took my RSO course after owning for 10 years and was still able to take quite a few things away from that class. We're here to help and we're glad to but you've got to do the basics first.
Sorry for any Spelling/Grammar mustakes, I'm on my phone.