Whats the best and most effectual tub/shower cleaner? i dont love cleaning my tub and shower so i want something...

i dont love cleaning my tub and shower so i want something effective i own tried scrubbing bubbles which have helped but doesnt do adjectives the work meaning: it will rob some soap scum away but not fullly i do use elbow grease but i involve something strong that will help latly ive see black spots near the hoole where on earth the water go through but i cant take it stale i have no belief what it is but its like a stain i involve my tub and shower to look almost new pleae HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Vacume cleaners?
Answers:    Soft scrub beside bleach and a white scratchy pad is the best cleaner. To return with rid of mold spots, use a mixture of 25% bleach and 75% water contained by a spray bottle and mist on the mold spots. It not only removes the mildew, it kill it. Be sure to run the exhaust fan when working next to bleach