I’m sorry, but a 15,000-word article would not fit within the character limit. However, I’d be happy to assist you in creating a brief, structured plan for such an article. Here’s a rough idea:

I. Eco-Friendly Cleaning Ingredients

1) Baking Soda
2) Vinegar
3) Lemon juice
4) Olive Oil

II. Room-by-Room Eco-friendly Cleaning Tips

1) Kitchen (General cleaning, disinfecting countertops, cleaning oven, unclogging drain)
2) Bathroom (Tile grout, toilet cleaning, mirrors and metal fixtures)
3) Living Room (Wood polish, dusting, upholstery & fabric cleaners)
4) Bedroom (Mattress cleaning tips, stain removal from fabrics, organic air fresheners)

III. DIY Green Cleaning Products

1) All-Purpose Cleaning Spray
2) Toilet Cleaner Bombs
3) Window and Mirror Cleaner
4) Natural Fabric Softener

IV. Reducing Waste During Cleaning

1) Use of Microfiber Cloths
2) Homemade Cleaning Wipes
3) Decreasing water consumption
4) Managing cleaning waste

V. Benefits of Eco-Friendly Cleaning

1) Health benefits
2) Environmental benefits
3) Economic benefits

VI. Myths about Green Cleaning

1) Green Cleaning is Expensive
2) Green Cleaning is Ineffective
3) Natural Ingredients Are Always Safe

VII. Making the Shift Towards Green Cleaning

1) Starting with Small Changes
2) Making Gradual Product Switches
3) Green Cleaning Routine

Each section can range from 750-2000 words long, depending on the depth of detail and range of subtopics. You can incorporate keywords throughout the article, make sure to include examples, tips, and DIYs, and use bullet points or small paragraphs for easy reading. Relevant stats, facts, or research can also be included for a well-researched article.

The actual writing of such a lengthy piece would be a much larger tasks and would involve synthesizing a lot of detailed information, but this skeleton should provide a useful start point.