Botolo la dewar ndi chotengera chochepa kwambiri chomwe chimagwira ntchito kuti chipatsidwe mpweya wabwino kwambiri pakugwiritsa ntchito. Pewani kutaya mpweya mu mpweya wabwino. Sanjani mopepuka, pewani kuphwanya masilinda ndi zowonjezera, ndikupeza zida chithandizo chadzidzidzi chotupa.
