Jaw gets too tired and deepthroating

Anyone know a trick for my jaw not to get so tired while I’m blowing my man? I’ll take short breaks when I get tired and switch to jacking him off and then start sucking again. Unless I just need to keep that cycle going? I’d love to be able to blow him longer with less breaks in between and to be able to deepthroat him without gagging as much. Ik there’s a spray for deepthroating that I could use but I was wondering if there was another way I could use.