doesn't start occasionally

Hello, I have a 90 toyota 22RE 4x4 starts up when cold all of the time. Very occasionally when engine is warm it will not start. hear click, have dash lights. Can roll start or jump and it will start right up and then fine for weeks / months then will happen again. Any suggestions of possible solutions would be helpful.

Replace the contacts in the starter solenoid. A common problem in DENSO starters. Cheap fix.

I'll give it a shot. Thanks