Dripping Delta faucet

I’ve replaced the cartridges, springs, and seats in this faucet twice. It works fine for a few months, then starts dripping again. The last time I used plumber silicone grease, which made it turn smooth, but now it’s dripping again.
Any ideas?

 

Call Delta and they will send you a new faucet.
https://www.deltafaucet.com/service-parts/warranty

They have been excellent. They recently sent me a new kitchen faucet under lifetime warrant.

 

They don’t make this faucet any more. Delta has lost money on me, I have called them so many times for replacement parts.
There are only two parts involved. The cartridge and the spring/seat. They use these same parts in most of their faucets. I just don’t see why it doesn’t hold like it should.

 

They probably will send you all new guts first and if it didn’t fix it they will replace it. I needed a replacement under warranty for a discontinued model that had corrosion when there were no parts available. They asked me to select a similar replacement from a list they sent me. They then sent me the new model.