MyQul
Chairman of the Bored
In your previous thread on this, as well as one possible cause being the yeast I also said sulphur tastes/smell can be caused by bacteria infection. By the sheer persistence of the taste over a number of brews and the fact you've used different yeasts leads me to suspect this might be the cause. Have you tried to eliminate bateria infection as a cause.
Infections/microbes can be bleedin' persistant because there so resiliant - If bacteria weren't so resilient/persistant there wouldn't be any life on earth which is good in general but bad for the HBer. Bacteria can form a 'biofilm' which if you don't thoroughly clean your kit they can hid under and use to resist sanisers like star san. Bacteria can also survive being boiled. While the bacteria themselves are killed there spores aren't so they can regrow.
If I was you I'd take the nuclear option to try to rule out a bacteria infection.
Replace all the plastic kit you are able to afford to. Then with your remaining kit you need to firstly thoroughly clean it, attacking the problem from more than one direction. a) Elbow grease - scrub everything extremely thouroughly.I'd doesn't really matter what you use. A scouring sponge and washing up liquid will do.Its the scrubbing itself which is effective.If your biab pot has a tap remove it and take it apart. From what I've read this is a notorious area for grime to build up and therefore bacteria. b) Chemical cleaning - soak everything in oxyclean. Oxyclean is good at cleaning away biological matter - 1tsp/5L for 40 mins then rinse thoroughly
Santising
Star san is good but I'm not sure it kills 'everything' It doesn't seem to effect wild yeast for example. You need to go to DefCon-1.
Again I would suggest a two pronged attack. Firstly heat. If you can fit it in your oven and it wont melt, 150C for 20-30mins should do the job. Everything else boil (in your brew pot) if necessary for 15 -20 mins.
As mentioned bacteria spores can survive boiling so time for the chemical attack - Bleach. Get some of that 29p thin bleach you can get from the supermarket. 100ml/2L is a good strong solution. Soak everything for 20 mins and rinse throughly.
I've had wild yeast infections twice (through my own carelessness) and got rid of them both time using the above 'two pronged attack'
Infections/microbes can be bleedin' persistant because there so resiliant - If bacteria weren't so resilient/persistant there wouldn't be any life on earth which is good in general but bad for the HBer. Bacteria can form a 'biofilm' which if you don't thoroughly clean your kit they can hid under and use to resist sanisers like star san. Bacteria can also survive being boiled. While the bacteria themselves are killed there spores aren't so they can regrow.
If I was you I'd take the nuclear option to try to rule out a bacteria infection.
Replace all the plastic kit you are able to afford to. Then with your remaining kit you need to firstly thoroughly clean it, attacking the problem from more than one direction. a) Elbow grease - scrub everything extremely thouroughly.I'd doesn't really matter what you use. A scouring sponge and washing up liquid will do.Its the scrubbing itself which is effective.If your biab pot has a tap remove it and take it apart. From what I've read this is a notorious area for grime to build up and therefore bacteria. b) Chemical cleaning - soak everything in oxyclean. Oxyclean is good at cleaning away biological matter - 1tsp/5L for 40 mins then rinse thoroughly
Santising
Star san is good but I'm not sure it kills 'everything' It doesn't seem to effect wild yeast for example. You need to go to DefCon-1.
Again I would suggest a two pronged attack. Firstly heat. If you can fit it in your oven and it wont melt, 150C for 20-30mins should do the job. Everything else boil (in your brew pot) if necessary for 15 -20 mins.
As mentioned bacteria spores can survive boiling so time for the chemical attack - Bleach. Get some of that 29p thin bleach you can get from the supermarket. 100ml/2L is a good strong solution. Soak everything for 20 mins and rinse throughly.
I've had wild yeast infections twice (through my own carelessness) and got rid of them both time using the above 'two pronged attack'