2. How do i replace the needle in my sewing machine?
If you are sitting facing the machine. On the right side of the needle you will see a tiny screw. Now unscrew it slowly and the needle will loosen up.. un-tighten just until the needle will slide out paying close attention to the direction of the “flat” side of the needle.. it is usually to the front but not always.
To sew denim you need a size 14 or 16 denim needle. If you do not have one that size when if you are sewing thru more than 2 thickness of denim then slow down the sewing speed to very slow and perhaps “help the machine” by turning the wheel on the right side of the machine … you will probably need to do this when going over seams.
I also make denim purses too so know the difficulty and I will still break needles because I get to sewing a bit too fast