Possible Causes: 1.Rubber stopper fitted tightly in the flask. Flask neck might be slightly narrow for the stopper or the stopper is slightly too small for the flask. 2.Rubber stopper has hardened somewhat with age to the point where rubber attains a strong bond with glass. 3.Rubber stopper is stuck due to vacuum formed inside…
Articles by Arosha Nanayakkara
Making Hand Sanitizer
Ingredients 250mls of 91% isopropyl alcohol 125mls of aloe vera gel (natural or store-bought) 15 drops of tea tree oil (or another antibacterial essential oil) 1. Pour the alcohol into a medium beaker. 2. Measure and pour the aloe vera gel. Alcohol can be hard on your skin, so using aloe is a good way to counteract that effect and keep…