When done drinking out of a bottle I rinse out twice and invert the bottle onto a dish rack. Then generally store bottles upside down or in cardboard box.
Right now dealing with an 20 year old glass carboy. Was clean and pulled off a good beer. I have the carboy with small amount of H2O and a sock I am using as a rag to slush around. This method has worked 100% in past. The opening is ~0.5" small. This morning realize the last 2% is actually in grooves built into the old carboy glass. So ...
Rinse off bleach/iodine before using items using very clean potable or distilled water. If you're using
bleach to sanitize, add one ounce of bleach to five Gs of water, followed by one ounce of white vinegar. Do not mix the bleach and vinegar together before adding to the water! The vinegar will make the water more acidic, which helps the bleach sanitize. Or...
Here is an old recipe for PBW. Go to your hardware store and buy some Sodium Metasilicate. Mix it with Oxyclean at a ratio of 2 parts sodium Metasilicate to 1 part Oxyclean. This stuff cleans like crazy.
Or just may toss the carboy in a dumpster 