6 month old won't nap!!

My 6 month old will not nap lately. Anyone else in this boat? She sleeps really well at night, 6 out of 7 nights a week, but when it comes to naps she fights them so bad. She is visibly exhausted and my husband and I are feeling defeated. Cry it DOES NOT work with her. It makes the situation a million times worse. We have tried rocking, laying her in her bed with her favorite blanket, back patting, feeding before sleep, walking with her, making the room darker, noise machines... idk what to do. She usually just ends up getting so crazy and passing out, but will then only sleep for 30 mins. So a few hours later we start all over again. What has worked for you for nap time?