Re: boiling inserts....
Do you have an automatic dishwasher? Try running them through that. I did with no soap and it really helped.
What REALLY helped my dipes & inserts smell fresh was switching to Charilies Soap laundry powder - its a detergent not a soap though lol But it works really well. I got it from Sunshine Diapers with a free shipping deal...not sure if thats still going on though.