Cleaning test kits

#1
My test kit cylinders are getting kind of filmy. Especially the Hanna checker. I would think if I got a test tube cleaning kit, it should do the job. Any idea where to get one or which one to get? I basically just want a brush, solution, and glass wipes.

Would you think a science kit would be cheaper than something labeled Red Sea or Hanna?
 
#2
For the Hanna Checkers I would just buy new, only $8 for 2. For the color meter to work accurately the glass needs to be perfectly clear.
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#4
Not necessarily cheaper but just a better idea for $4 each. As the cuvettes get old they get micro scratches on the glass that can effect the testers results. Just think if they are that old that you need to clean them you might as well replace them.



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