Musty/mouldy smell

[JaggyExEf]

Hi All. So I previously asked about a mouldy/musty smell in my car XF R-Sport 2017 model. I was told it could be the cabin filter. Got a new filter. Changed it myself. Jag garage wanted £80! Took me an hour to do. I digress. Anyway. After having changed the filter. I'm still getting this smell. Any idea as to what this could be? 

 

Thanks in advance 

[Jimbov8]

Get hold of an aircon bomb and try that. If that doesn’t cure it then further investigation is required.

[LairdScooby]

I'd go for the aircon bomb too, follow the winstructions closely on it though as any deviation makes them useless.