My favorite all purpose pre-made scrubber is Bon Ami.  It has been around since 1886 because it works so well and even better, it is non-toxic and biodegradable!  It is great for many surfaces…I use it in the bathroom and kitchen on tile, sinks, counters and even sometimes on pots and pans to scrub away burnt-on food.  It retails for just over $1 – well worth it!