How can I avoid the build-up of the precipitous film sometimes seen in 10X TBE?
The precipitation of concentrated TBE stocks may be due to nucleation of salt crystals by dust particles or other insoluble materials. Therefore, filtering the solution through a 0.2 µm cellulose acetate or cellulose nitrate filter after preparation helps avoid this precipitate. [Mayeda A, Krainer A (1991) BioTechniques 10.2, 1820]