Heater blower fan only works on High setting

What is your question?

Several issues- The blower fan only worked on high setting and then made a lot of noise. I removed the cabin air filter and it was messed up. Also the filter holder was broken and there was some insulation or something in the fan. I've found out the blower fan resistor is probably faulty and needs replacement. Any idea what the other stuff in the fan is from? Is there supposed to be some insulation above the filter, or behind it? Thanks for the help.