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...does anyone have any experience?
My last brew (see: http://www.brewersfriend.com/forum/viewtopic.php?f=3&t=95) has left a thin film stuck to the bottom of each and every bottle. At first I figured it was just some yeast, but now I am not so sure. It is the same yeast that I always use (WLP007) and have never had a problem just rinsing out of the bottles, but no matter how long I soak these bottles in soap and water it refuses to come out.
Caustic soda seems to be pretty standard for cleaning more heavily contanimated brewing equipment, so I got a hold of a package of crystals and mixed up a 0.5% solution, as instructed...
(PS, the instructions in the photo are actually for a 0.1% solution)
After an hour of soaking, the film was still in the bottom of the bottles, so I left them overnight. This morning (~8hrs ago), the film seems to have disolved some, but not completely. I really hope that the bottles will finally be clean when I get home in a couple hours, because I need to bottle my newest brew this evening!
Even if they are clean this evening, it still strikes me as unusual that it would have taken so long.
Was 0.5% too weak? Should I have made the solution stronger? I have seen references to 2-4% solutions for cleaning kegs, but I am a bit worried about not being able to properly rinse too strong of a solution and/or it burning a hole in something. :|
My last brew (see: http://www.brewersfriend.com/forum/viewtopic.php?f=3&t=95) has left a thin film stuck to the bottom of each and every bottle. At first I figured it was just some yeast, but now I am not so sure. It is the same yeast that I always use (WLP007) and have never had a problem just rinsing out of the bottles, but no matter how long I soak these bottles in soap and water it refuses to come out.
Caustic soda seems to be pretty standard for cleaning more heavily contanimated brewing equipment, so I got a hold of a package of crystals and mixed up a 0.5% solution, as instructed...
(PS, the instructions in the photo are actually for a 0.1% solution)
After an hour of soaking, the film was still in the bottom of the bottles, so I left them overnight. This morning (~8hrs ago), the film seems to have disolved some, but not completely. I really hope that the bottles will finally be clean when I get home in a couple hours, because I need to bottle my newest brew this evening!
Even if they are clean this evening, it still strikes me as unusual that it would have taken so long.
Was 0.5% too weak? Should I have made the solution stronger? I have seen references to 2-4% solutions for cleaning kegs, but I am a bit worried about not being able to properly rinse too strong of a solution and/or it burning a hole in something. :|