I want to remove old olive oil from this bottle...any ideas?

homeguides.sfgate.com/removing-rancid-oil-glass-bottles-43887.html

Thanks! I'll try it!

How about a baby bottle brush with soap looks like it would fit good luck

Soak it in hot water and dish detergent over night and then use a bottle brush, you should be good to go!

I would like to say have you tried a Tablespoon of uncooked rice as it works like an abrasive when you also add half of the size of your bottle with warmish water with the rice and shake well. Try this a few times then once the bottle is clean add a tiny amount of soft soap shake and then rinse really well. Hope this helps.

Januk

Put it in the dishwasher on sanitize! Mine gets hot enough to erase the residue!

Vinagar?

Crushed ice and salt. Shake it around dump and repeat. Then wash in hot water.

I collect crystal pieces and many are really dirty and nearly impossible to clean inside. Someone told me to fill it with water and drop a few tablets for cleansing dentures, its amazing, it really works!

I clean/degrease all sorts of kitchen stuff, from pots and pans with years of built-up grease and oils to the mesh filter from the vent fan over the stove by making a really strong solution of hottest tap water and dishwasher detergent in a plastic tub or container big enough to hold the item. Let it soak several hours or overnight, then rinse in hot water and let dry. I've used this on metal, glass, and plastic with amazing results. I don't measure the detergent, I just dump a bunch in and stir until dissolved and then soak the item. For your project, you could probably just make the solution right in the bottle, rather than a whole tub of solution.

Have you tried Degreaser, or the baking sofa/vinegar mixture And let it do the work?

Drop in two polident tablets, fill with water and let it sit for awhile. Works for me.

I use Grease Litghting. Just spray it in the bottle and shake it good should rinse out. Be sure to use very hot water. This stuff will remove any kind of grease. Make sure to read the label.

Fill half way with hot water and add a handfull of sand. Put the lid on the bottle and start shaking. The sand will cut through the crease and it will come off. It might take a few minutes but the effort will be worth it.

Vinegar soak over night.

alcohol or acetone (nail polish remover) will act as a solvent and dissolve the oils...then you can wash out with dawn soap.

Dish washer?

Denture cleanser will take it off.