How To Clean Sample Tubes?

[JesseJames]

Mine are hazy/foggy looking. I remember reading some where how to clean them. I thought it was in the Extended Directions, but can no longer find it.

 

[Bama Rambler]

It's in the directions for the FAS-DPD test. Here's the quote

Over time, it is common for a cloudy residue to build up on sample tubes used for FAS-DPD chlorine testing. The residue can be removed by filling the sample tube with bleach, letting it sit for several minutes, rinsing, and then wiping throughly with a paper towel.

 

[257WbyMag]

Thanks Bama! That really worked on my FAS-DPD tube. That's a good tip.

 

[JesseJames]

That works great. Thanks!