Khando - I use the spray on everything; bath, shower screen and sink etc (I don't have tiles; I've got shower panel things!) But I don't clean the bathroom every day - probably about 3 times a week.
Scrubbing Bubbles works great. Spray it on, let it stand for three minutes and turn on the shower. If you have built up scum follow the same procedure except use a scrub pad while shower is running. Works every time.