Always Wipe Needle Tip Clean

Whenever you removed needle from mixture, wipe with a kleenex.
This will prevent mixture from cooling into a solid on needle tip and creating a block.
You should also push air from the syringe until a little bubble of liquid appears at the tip of needle.
Wipe the bubble away. By pushing liquid up to needle tip, it ensures no liquid hardens within the needle point itself.
You should always be checking to make sure that no blockage occurs when liquid cools around needle point.
Check to make sure needle point is clear each and every time you remove needle point from mixture.

If there is a blockage, just tap the metal side of the needle against the stove element, and usually that is enough
heat to remelt the mixture. Again, push some liquid up until it forms a bubble at the tip, to ensure needle is not blocked.

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