Fibre Free cloth + Fast Fret is the best.

At the moment, I use the Planet Waves string cleaner..... it was an emergency buy.

I now support Dunlop and D'addario strings....... for drop D and saving Dollars

But seriously, these 2 brands are so far so good on my part. D'addario's seem to last longer and can be subject to more abuse on the thinner strings. But the Dunlop are awesome for low tunings and thick too......

Elixirs should be around RM40-60 Price range per pack.