I have REALLY hard water and I use the GreenWorks products on my sinks. It works pretty well - the toilet bowl cleaner is good and the bathroom/kitchen cleaner is good as well. It shoul d remove the hard water stains if they are not too bad. If they are really bad, PM me and I have some other products I use but the GreenWorks stuff is usually pretty good.
For room by room cleaning what you should do is by priority and my priority is always on the areas that others see first. For instance, if the entry way is the first place everyone coming to the door sees so clean that first. Once that is done on the entryway, I then work on the next place - usually the living room. Then I move onto the kitchen - - then bedrooms.
The way I clean each room is I use a microfibre cloth on a mop and sweep down the walls and give the light fixtures a swipe (if I really have to, I dust them and then wash them)- I give the curtains a Spritz of Fabreze (or wash them if I can). Then I tidy up the clutter and put away half of the knick knacks on the tables into the closet (usually those non-Christmas related which I switch out for the Christmas stuff). I then throw out or donate anything hanging around that I haven't used or looked at in 6 months (magazines, catalogues, etc.) Then I vacuum the floor and dust the end tables with a clean microfibre cloth (you can buy these at the dollar store or
Walmart).
I only deep clean my house like this twice a year but I find I have to keep on top of the clutter and extra paper like magazines and catalogues.
If you do it room by room, be sure to keep the clutter out of the rooms you've cleaned - a de-cluttering once a week should work - go through the public rooms of the house and move the clutter unessential items into their proper place or the garbage bin
And relax - the best places to visit are not rated on whether they are showplaces but whether or not the people who live there show love.
My favorite Christmas smell is from those huge pine cones you can buy at Wal-mart or Michaels - they are cinnamony and smell like Christmas to me!