What can I do to repair my minifigures loose neck/head joint? I have a number of loose neck joints on my minifigures. How can I repair them? Any suggestions?
In the old days, minifigures had a dab of paint on the neck. I don't know if it was for this purpose but it would wear off over time.  You can paint some nail polish or acrylic on the neck to strengthen that connection. Thin the acrylic (use water based) before applying.