Sue; Don’t buy a new tip just clean the old one. With a screwdriver
unscrew the brass fitting at the base of the torch carefully remove
it as a small orifice will be on the end which can easily fall out.
This is what gets clogged. I thing they sell a wire tool at any
welding supply store or just try to run a very small wire through it
to reopen it. Make sure you watch how it came out of the hole so you
put it back the same way. It should work like new.