Invade of German & Brown Roaches

In newyork where ever I go I find either roaches or mice. I hate both. in my current apartement they are alot I think hunderds of them reside in. reason? well my room mate never bothered to take care of them but when I moved in I took them seriously cause they are nasty and they make you sick.
just last summer I used raid max black & it worked pretty fine. it kept killing them or at least I couldnt see them for a while. Now for this apartment I couldnt find the same product at walgreens.
so I bought raid max bug barrier which claims to keep killing german roaches for upto 12 months but either thats a fals claim or all left in my apartment are browns roaches.
after using the first bottle I saw a dramatic decline of roaches. but after 48 hours there were a few but they were the big ones or tiny ones seem like just hatched.
so i bought 2 more bottles and sprayed thoroughly but that only helped with on contact, later on you could see the queens/mothers the big ones venturing around. so I went and bought 2 boxes of old time moth balls. I placed them in my room and they seemed to work a little as I didnt see any afterwards. but still there are some.
so after deciding that enough toxic pestisides in home I should look for a natural way. being from sub continent I know there are a lot of natural stuff out there freely avaialabe to use to repell pests rather spend on harmfull pestisides. for example a tree called نیم "neem" is very good for termites and book worms.
anyway so I found this and I am going to give it a try.
first is boric acid which is suppose to kill them all as its toxic to roaches.
second is the mixture of baking powder & sugar with a nearby source of water which is going to create a gas trouble for the roach and eventually will kill 'em.
any other ideas or tips are welcome.
I will write an update about whether these method worked or not.