Are the "fluffy parts" web like?
Did you mean "dark RED streaks on my skin" when you squash them?
If the answer is yes to both of these I am leaning towards spider mites as the issue. I have never used mavrik etc so can't say whether this would be effective, I have used lime sulfur as a dormant spray though after seeing them a couple of years back which seemed to work. Obviously this isn't any use now as it needs to be applied in winter. Neem oil I understand can be effective too but again, I haven't used it specifically for spider mites. The real problem with spraying is that things like ladybugs which prey on the mites are also taken out, and these are most likely actually more effective at eradicating mites if you can encourage them. You would need to be diligent with reapplications if you do spray to ensure complete eradication across the lifecycle.
I was also advised to spray the areas with a jet of water and then try and keep the foliage moist for a week or more following as the mites like hot and dry conditions. The initial spray dislodges them and the wetter environment following makes it uninviting for them to return. I did this (re-jetting the areas every couple of weeks) and if it didn't completely get rid of them, it did stop the issue getting worse until winter came and I could go with the lime sulfur as mentioned. Of course, the down side to constantly wet foliage could be fungal issues etc, but I seemed to avoid these.
