about making agar bridge

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engstar
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about making agar bridge

Are there some netfriends who are experienced in making agar bridges? I 'd like to know the LENGTH and the SHAPE of the agar bridge.
Actually, we made some agar bridges of about 3 cm in length and about 2 mm in diameter , but after instaling it, great noise appeared, although we had cleaned the outer surface of the bridge. The current baseline "danced", which troubled us a lot.
 

engstar
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We tried to shorten the

We tried to shorten the length of the agar bridge to about 1 cm, and the noise became much less, but  was still quite worse compared with directly ground the bath using Ag/AgCl.  I wish you can share your experience with me.