by 
Dallas
ANSWERS: 4
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"Wash labware as quickly as possible after use. If a thorough cleaning is not possible immediately, put glassware to soak in water. If labware is not cleaned immediately, it may become impossible to remove the residue. Most new glassware is slightly alkaline in reaction. For precision chemical tests, new glassware should be soaked several hours in acid water (a 1% solution of hydrochloric or nitric acid) before washing. Brushes with wooden or plastic handles are recommended as they will not scratch or abrade the glass surface." See: http://www.corning.com/Lifesciences/technical_information/techDocs/cleanglass.asp?region=na&language=en#Cleaning For more information.
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I work in a lab and we wash all of our glassware with warm, soapy deionized water and then wash it again with acetone. Now if you had some reactive solvents in the flask beforehand I would recommend something different. Example: THF (tetrahydrofuran) reacts violently upon contact with water so you wouldn't wash it with water :) I would choose an appropriate solvent and then put it in the oven to evaporate the cleaning solvent.
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My uncle who used to own a glass- blowing company showed me an incredible trick for cleaning ANY kind of glass surface - no matter what's been burned, rusted, caked, or molded onto it. It's a rust remover you can find at most hardware stores called "Whinks". It comes in a brown plastic bottle with a white cap & it's usually around $5 - $6. Here's a link: http://www.whink.com/rust_stain_remover.htm I don't know if this is the best thing to use right after you've been mixing other chemicals in the glassware, but rinse it really well before (& after obviously) & it'll be like nothing you've ever seen- I'm serious. Well, I really hope this help!
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For our calibration oils glassware we used a dishwasher and a special detergent. The dishwasher was fed from our DI water system. Alconox or something like that was the detergent.
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