Red Sea Phosphate test kit question

[EHaddad]

Okay I have a Red Sea Phosphate test kit and I’ve noticed my glass bottles are stained blue alittle I was wondering:
1. has anyone had this issue
2. How do I clean them

#RedSea

 

[EHaddad]

Okay I have a Red Sea Phosphate test kit and I’ve noticed my glass bottles are stained blue alittle I was wondering:
1. has anyone had this issue
2. How do I clean them

#RedSea

Help

 

[AdamNC]

Quick vinegar soak, swab out with a cue tip and then RO rinse. I do that before every test and have no issues with staining.

See my sig