BGS Beer Glass Resparkle Detergent J003 5L (2 Pack) SeldenBGS Beer Glass Resparkle Detergent J003 5L (2 Pack) Selden Essential for all pubs, clubs and restaurants that use enclosed dish and glass washing equipment. Specially formulated to leave glasses sparkling clean, streak and taint free. Sold in an Avern branded container under the name Resparkle BGS, it is very economical to use as it can be diluted at a ratio of 1 part to 400 parts water, meaning one 5 litre container can make up to and over 1500