Try some sweet pdz mixed in. Pics of your set up could help as well.
If you have been having the cold weather, snow, ice, thaw ... that is probably adding to it.
I am using the deep litter method in the run on a small scale with pine shavings. The first time it got that ammonia smell, I got worried and cleaned it all out. Then, I read more about dlm. So, now, I rake it and stir it once or twice a week to get to certain spots that the chickens don't get to. Then add a light layer of pine shavings.
It has been working well. If it gets wet, there is a smell, but I just turn it and add a layer. I have had to remove some of it due to the set up I have.
My coop is a prefab and so I clean out the poos from roosting every day. I add sweet pdz and pine shavings when they need replenished. I don't have a problem with the pine shavings matting and it has been a really wet year this year due to the weather conditions.
There are two different kinds of pine shavings one is finer which some like, but I find it dustier - I use the coarser cut. I guess it is trial and error to find out what works for you.