Carboy has weird white spot

[khillian]

Hey Yall,

Brewing tomorrow and been trying to clean my 6.5 gallon glass carboy. I have PBW soaked and brushed, and even threw a teapot of boiling water and brushed. This white spot shown in the photo has not budged, do yall think this could be a flaw in the glass? Any other cleaning tips or has anyone seen anything like this?

Thanks.

 

[amandabab]

lime scale at the spot where a drop forms and dries instead of falling when its upside down to drain.

CLR soak it and it should clean up.

 

[khillian]

Amandabab,

Do not have any CLR currently, trying a white vinegar and hot water soak. So far no budge, even took a racking cane and abrasive green scrubbing pad in there, so far no luck. Will this hurt my next batch if this stain is there?

Thanks.

 

[jesseroberge]

Homebrew shop near my place sold me a new carboy this week for 10$, brand new... If your not able or sure about your actual one, i'd say go for the new

 

[DerCribben]

Homebrew shop near my place sold me a new carboy this week for 10$, brand new... If your not able or sure about your actual one, i'd say go for the new

WOW, I wish I lived near your LHBS, I can't get a 5gal glass carboy in Maine/New Hampshire for less than $35