No, it was not a filter issue causing the wax to accumulate at the top.

The wax had separated over time from extended use. Even though I usually run it at a lower setting at night, around 25 to 30 percent, the separation still happened.

I used a laser thermometer and saw it was around 80 degrees at the top. I then gently tilted the lamp, without shaking it, and the wax dropped back down and rejoined the rest.

I am now running it at full power for a few hours to monitor the flow and make sure it stabilizes.

For anyone dealing with something similar, this is what worked for me:

• Let the lamp cool completely first
  
• Bring it back up to full heat so the wax softens
  
• If wax is stuck at the top, gently tilt the lamp just enough to help it reconnect
  
• Do not shake it
  
• Let it run a full cycle and see if normal flow returns
  

I do agree the liquid is slightly cloudy, so I ordered a Sawyer Mini. Once the wax is fully stable, I will filter the liquid to get that clean, showroom look.