Use masking tape to make a neat line when you recaulk the shower or tub. - How to Re-caulk a Shower or Bathtub: http://www.familyhandyman.com/bathroom/remodeling/how-to-re-caulk-a-shower-or-bathtub/view-all
How to replace black moldy caulk and clean a tile shower. Ugh. Gonna have to do this with one of our showers since every other pinterest tip on cleaning moldy caulk just ain't making it looking good as new! Ewwwwww.
Home Improvement DIY: If your tile grout is dingy and nothing gets it white you are going to love this product. It is a grout colorant that will have your grout white in no time. Fast and budget friendly!