Baby ringnecks and BATHING!

Hey!

I have two baby IRN's who are a month old. So I know I'm not supposed to give them a shower but at what age exactly can I give them a shower because they're starting to stink and their feathers are starting to have a weird texture to them. Also, there's no proper info about it anywhere :(

Thanks for reading my worries I'm a big curious cat yikes. :D