🚽 Overnight Limescale Eraser (1L Edition) | Bambu A1 Optimized

The ultimate deep-cleaning tool for stubborn toilet limescale. This is a 3-part functional system designed to deliver a continuous, slow-release chemical wash over the back of your toilet bowl. Instead of scrubbing, this gadget uses the power of sustained contact to dissolve thick calcium and mineral build-up.

🛠️ The Design

• Precision Anchor: The "T-Hanger" hooks directly onto the metal seat-mounting bolts at the back of your toilet, keeping the system stable and perfectly centered.
• Multi-Point Distribution: The bottle attachment features a curved reservoir that matches the contour of the toilet interior.
• Precision Drip: A series of tiny, calibrated holes slowly release your cleaning solution (Vinegar or Citric Acid mix) across a wide area for maximum coverage.

🚀 Print & Go (3MF Included)

This project is optimized for the Bambu Lab A1 with a 0.4mm nozzle:

• Plug & Play: Open the 3MF, slice, and print.
• Material: PLA (Only ~53g total).
• No Hardware Needed: Just use a standard recycled bottle.

📋 How to Use:

1. Prepare your bottle: Fill a standard 0.5 - 2L bottle with up to 1 liter of distilled white vinegar or a concentrated Citric Acid/water solution - Make sure to add a drop of dish soap to help with surface tension.
2. Attach: Screw the Bottle Attachment onto your bottle.
3. Mount the Hanger: Hook the T-shaped hanger behind the metal screws/bolts of your toilet seat.
4. Start the Clean: Hang the bottle assembly onto the hook at the bottom of the hanger. The solution will begin to drip through the tiny holes along the back wall of the toilet - If the bottle is unstable, you can use the “flaskholder” to secure it.
5. Finish: Once the bottle is empty, remove the gadget, give the bowl a light brush, and flush.

⚠️ Safety First:

• Acidic Cleaners Only: Use only Vinegar or Citric Acid.
• NEVER MIX WITH BLEACH: Mixing acids with bleach creates toxic chlorine gas. Ensure your toilet is rinsed of other chemicals before use.

I have included a test print of a small object which matches the contour of the bottle assembly, print this first to make sure it fits snuggly along the back of your toilet bowl

Beware that this is modelled after EU type bottles - I dont know if the screw top differ around the world.

If your country does not have that type of screw on lid, tell me and ill make a printable bottle so everyone can use it.

Im honestly pretty proud of my invention.. I tried everything to remove that stuff, including scrubbing with one of those “cleaning stones”, but it never really worked imo. 


Here is a short timelapse video of the item being used. Notice that im using a different item in the beginning. That was just an earlier prototype.