Can towing and/or payloads wear out leaf springs over time?? I've had my trailer for about a year now and use it on average once a month. Here the past couple of trips though, it really seems like the *** end of the truck is sagging more so than it used to when we first got the trailer. I have the weight distribution bars in the same location. No, I don't know the tounge weight of the trailer, but it ain't light

I do not have helper springs and not gonna get them. I think I'm going to get air bags before my next trip but just wanted to see what this does to the springs in the long run and will the air bags save the springs, or any of that stuff.