Dirty laser lens after cleaning and resetting

Hi, Has anyone had a Lens warning that will not go away, mine started this afternoon, I cleaned the lens, even though it wasn’t dirty, reset the warning but it came back after a few seconds of cutting some cardboard.
I then changed the lens for the spare one but the same thing happens, every time I reset the warning it comes back after a few seconds of use.
Anyone else seen this?

I too am having this issue, I look forward to see what you learn…

I’m having the same problem. Any ideas?

I’ve sent an email to the creality support about it but not heard anything back yet.

If I get an answer ill post it here.