Glassware used in air sensitive chemstry is routinely oven dried prior to use to allow and traces of water to be evaporated from the glassware. When removing glassware from an oven, it is important that an inert atmosphere is introduced into the flask before it cools down, as this reduces the chance of atmospheric moisture being able to condense on the glassware. It is not just glassware that can be oven-dried, but other equipment used in the reaction may need to be effectively dried, for example stirrer bars, reusable metal needles, and cannulas. The reaction being conducted and the sensitivity of reagents will help inform as to whether equipment needs to be oven-dried.

Glassware will begin cooling as soon as it removed from the oven, so it is important to plan for the assembly of the glassware. As you remove items, they may need to be sealed with septa and balloons of nitrogen (or other gases) introduced as soon as possible.