Frustrating nappy changes

Hi all Mummas out there.

As of the last few weeks my 19 month old will not let me change his nappy. He will flip himself over to get away and when I ask him to come back to me he won't listen. He will only let me change him no real fuss if he is truly tired and that's usually just before bed time. I try my best to get it done but I usually always have to get my hubby to come and take over and it's frustrating because he will then lay there and let my hubby change him no problem. What I want to know is if anyone else out there has gone through the same or similar and what helped? I have tried distractions with toys and the occasional milk biscuit but even then.

Any advice from other Mummas would be really helpful and muchly appreciated.