HELP My ball python WILL NOT eat rats

[u/ConcertFriendly8223]

So I’ve had feeding issues with my ball python and ever since I got him. He would only eat rat fuzzies every 3 weeks. In desperation I gave him large mice instead and he ate them enthusiastically every week for months and put on quite a bit of weight. I was elated. Now that he is 400 grams he needed larger food so I got him weaned rats. Ik that rats are the most nutritious for them so I had always planned on switching. Well he won’t eat the rats. I tried giving him XL mice, he ate one but never had interest in eating any more. After a month long hunger strike I caved and cave him a large mouse like he was used to which he took happily. I’ve once again started trying to transition him to weaned rats and am loosing hope *sigh* he’s still young and I really don’t want his growth to slow.

What I’ve done:
-heating weaned rat with large mouse so they can smell similar?
-Blow drying prey (shows interest but leaves once he sees what it is)
-braining
- increasing humidity by 10%

Enclosure parameters:
50 gallon (planning on upgrading to 4x2x2 once eating consistently again)
Humidity at 70%
Hot side 94F cool side 72F