Try and get some decent abs.

I printed with abs exclusively for a few months (until I tried pla - now there's a whole shelf of abs I don't think I'll ever use)- never had a nozzle clog, never used cheap abs either But did always have to use a raft.
reprapper tech ltd pretty much make the best all round filamaent both abs and pla I've currently used.

And almost every roll of filament is slightly different.
Even different colour filament from the same manufacturer will print at different temperatures. The colour pigments make a lot more difference than you'd expect.