Hi all - I'm new to working on guitars. I bought a couple of cheap Squier Strats to practice working on. One I simply pulled apart and put back together. The other I changed the pickups, switch, and pots on, although those electronics were pre-wired together. Both of them are producing a buzz now when plugged into the amp. However it goes away when I touch the strings. So I'm wondering what I need to do to fix it. Not sure if adding shielding to the guard and body would help. I also wonder if it could be related to input jack wiring/connection as that is one point I had to solder, and I suck at soldering. Also wonder if that wire should be a shielded wire? Anyway, any guidance for a noob is appreciated.