<p>Here is the sequence of my Gcode, printed in mid-air:</p>

<pre><code>Print (E20)
Retract (E-20)
Dwell (G4 10,000)
Move away (E0)
Print (E20)
</code></pre>

<p>See the path on the printscreen below:
<a href="https://i.stack.imgur.com/rbYqY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rbYqY.png" alt="enter image description here"></a></p>

<p>When the printer dwells it oozes. How can i stop that?</p>

<p>I am using a WASP 3MT, pellet extrustion, 3mm nozzle, Marlin firmware, Gcode done on Silkworm for Grasshopper.</p>

<p>Gcode around the dwell:</p>

<pre><code>G1 F300 X-25 Y-25 Z30 E15.96
G92 E0
G1  F0 X-25 Y-25 Z30
G1 F1000 X-25 Y-25 Z36 E-89.42
G92 E0
G4 P10000 
G1  F0 X-25 Y-25 Z36
G1 F1000 X-25 Y-25 Z32 E0
G92 E0
</code></pre>

Since you retracted the filament (very far), but stay at elevated temperature for almost 2 minutes, this must be left-over residue inside the nozzle/throat that is stuck to the wall that becomes liquid and oozes out of the nozzle because gravity pulls it downwards.
This answer
on the question
"Ender 3 extrudes plastic whilst at standstill, and while moving to start of print"
explains the oozing problem in detail.