Thank you for taking the time to make a clip; it makes it easy
There are only two possible causes of this issue;
1. The seal has become hard. To test if the deal has hardened try crushing it from opposite sides of the circumference with your forefinger and thumb; if cracks appear on the outer circumference if the seal it needs to be replaced
2. The screen isn’t clean. This will be the case if the cause is silicone grease as it is translucent. To test water should run through the screen. You can also try touching in the holes in the former from the top side of the screen down with the tip of a needle and I expect you will get silicone grease on the needle tip.
I think you will need to scrub it with acetone and an old toothbrush.
I have not put any extra silicon grease (don't have any either). I'll do one more acetone soak and scrub when I get to it but for now it is what it is, I can still make coffee. I can't detect any grease on either the seal or the shower screen. I couldn't scrub woven mesh from the inside , so there might be some grease on that side, or the mesh itself is clogged. I need to place an order for a seal replacement set anyway so that way I'll have a chance to see if a new seal or shower screen makes a difference.
Then I poured some water in the basket to test if water would flow through. It barely did but that could be normal.
Here is an update. I soaked the screen in Acetone for 24 hours and scrubbed after it but that didn't do anything. Could be my that my wife's nail polish acetone is not powerful enough. Water wouldn't run through as it did in Reiss' video. So it was either ordering a new one or trying to burn it with flame.
I held it over the flame for about 1 minute, noticed some smoke. Not sure if I made any damage with this method but it seems fine, the screen is not popping off at least. I'll report if any issues with the shot flow.
I am having the same issue with mine... I did clean all the grease off when the machine arrived... flushed a couple of times, clean any grease again. This was all with the stock showerscreen.
I then I installed the IMS 35 screen... worked fine for a few weeks and during a flush it popped out. Thinking it was grease clogging the screen, I took it out and cleaned everything again. Could not detect any grease... but nonetheless I cleaned everything... even cleaned the surface with alcohol to make sure it was nice a clean... not just a wipe with a cleaning cloth. I then installed a new IMS 35 (I got a couple of spare IMS 35 screen when I bought my machine) .... well... it is doing it again.
Reading that acetone did nothing for the OP... I do not have high hopes... I will pull out the first IMS 35 that I installed and dip that one in acetone... the one in there now I have in Cafiza...
Screen floats so obviously it is clogged...
Anyway, glad I came across this thread. Let me try the acetone route first before playing with fire...
No matter what I did with my IMS I couldn't get it unclogged (I assume it was too much grease in the machine from the factory as I never cleaned it) once I switched to the factory shower screen everything has been fine. Not sure if there was perhaps a bad batch of IMS screens but nothing I can do has fixed the clogging on mine. Hope you are able to fix yours!