Do not oil striker assemblies. Oil/grease will attract dirt and residue. Old oil/grease can gum and congeal into a semi-solid mess.
Disassemble the slide and de-grease the striker assembly with Gunscrubber or a similar product. Re-assemble and shoot.
Disassemble the slide and de-grease the striker assembly with Gunscrubber or a similar product. Re-assemble and shoot.