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Start from the top and work your way down:

• Ceiling and walls (remove cobwebs, wipe down tiles)
• Mirrors and cabinets
• Shower and bathtub (use descaler or vinegar solution)
• Toilet (inside bowl, outside base, flush handle)
• Sink and countertop
• Floor (sweep, then mop with disinfectant)
  This top-to-bottom approach prevents recontamination of already cleaned areas.

Read more at – https://www.amenify.com/blog/how-to-clean-your-bathroom