[Fire Rooster]

22 oz brown glass bottles are used.
When a bottle was held up to the light dots,specs,streaks,?,
were noticed on the inside.  Soaked 24 hours with PBW
and then used bottle brush, very little changed.
Not every bottle was spotted.

Squirted a little bleach in each bottle then filled with hot
water. 30 minutes later spots are all gone.  Followed up
with a water rinse, then an iodophor rinse & drain to get ready
to bottle.

Any idea what they were ?
Must be in the yeast, mold, fungus category for bleach to
react so soon.

Thanks

[KellerBrauer]

22 oz brown glass bottles are used.
When a bottle was held up to the light dots,specs,streaks,?,
were noticed on the inside.  Soaked 24 hours with PBW
and then used bottle brush, very little changed.
Not every bottle was spotted.

Squirted a little bleach in each bottle then filled with hot
water. 30 minutes later spots are all gone.  Followed up
with a water rinse, then an iodophor rinse & drain to get ready
to bottle.

Any idea what they were ?
Must be in the yeast, mold, fungus, mold category for bleach to
react so soon.

Thanks

What do you see when you hold the bottles up to the light and look closely inside?  Do you actually see “stuff” clinging to the inside of the bottles?  Perhaps you could wrap a bottle in an old towel and hit it with a hammer to break it and actually see and touch whatever is inside.  Did you have the correct dilution of PBW?  I believe it’s 2oz. per 5 gallons of water - if memory serves.

My experience with PBW is: if PBW doesn’t take it out, it ain’t coming out and the bottle needs to be tossed.

[Fire Rooster]

22 oz brown glass bottles are used.
When a bottle was held up to the light dots,specs,streaks,?,
were noticed on the inside.  Soaked 24 hours with PBW
and then used bottle brush, very little changed.
Not every bottle was spotted.

Squirted a little bleach in each bottle then filled with hot
water. 30 minutes later spots are all gone.  Followed up
with a water rinse, then an iodophor rinse & drain to get ready
to bottle.

Any idea what they were ?
Must be in the yeast, mold, fungus, mold category for bleach to
react so soon.

Thanks

What do you see when you hold the bottles up to the light and look closely inside?  Do you actually see “stuff” clinging to the inside of the bottles?  Perhaps you could wrap a bottle in an old towel and hit it with a hammer to break it and actually see and touch whatever is inside.  Did you have the correct dilution of PBW?  I believe it’s 2oz. per 5 gallons of water - if memory serves.

My experience with PBW is: if PBW doesn’t take it out, it ain’t coming out and the bottle needs to be tossed.

The PBW solution could of been on the weak side, I think I used 1/2 recommended dosage.
I bought these bottles, I'm too cheap to break one.  What was surprising is that a bleach
solution took it out quickly.  When held up to the light there is no mistake that dots are clinging
to the inside surface, lots of them, seemingly in a pattern.

[ynotbrusum]

Were the bottles previously used or brand new?  If used several times, it could be something like beer stone, perhaps?  I treat my corny kegs with dairy milk stone remover periodically to keep beer stone at bay.

[Fire Rooster]

Were the bottles previously used or brand new?  If used several times, it could be something like beer stone, perhaps?  I treat my corny kegs with dairy milk stone remover periodically to keep beer stone at bay.

I bought 7 cases of 22oz beer bottles about 2 years ago.
A new batch of about 2 cases are bottled every 2 1/2 - 3 weeks.
I drink one bottle per day starting with oldest first.

Early in my brewing hobby I used DME, LME, lemongrass,
Belle Saison, pine tree nips, etc,. I now only use hops,
malt, water, yeast.  I got ahead of myself and now focusing
on making good/great beer with the basics.

Whatever it is I'm certain a lot of bottles have it and will
take some time to clean since most are filled.  The beers
are not bad with these bottles, but maybe not as good
as they can be.  I also think it's the culprit of why some
bottles in the same batch are much more carbonated.

This morning I soaked all equipment (not metal) not being used with
one tablespoon bleach per gallon of water for 30 minutes.  Will sanitize
and rinse again with star-san before use.

[fredthecat]

22 oz brown glass bottles are used.
When a bottle was held up to the light dots,specs,streaks,?,
were noticed on the inside.  Soaked 24 hours with PBW
and then used bottle brush, very little changed.
Not every bottle was spotted.

Squirted a little bleach in each bottle then filled with hot
water. 30 minutes later spots are all gone.  Followed up
with a water rinse, then an iodophor rinse & drain to get ready
to bottle.

Any idea what they were ?
Must be in the yeast, mold, fungus category for bleach to
react so soon.

Thanks

I think regardless, there won't be anything living if you nuked it with those things. PBW works ~99% of the time, it often leaves a few spots, just had to keep working at it with water and temperature it sounds like.