Contains formaldehyde releasing preservatives

My son is allergic to these "hypo-allergenic" wipes because they contain DMDM Hydantoin a formaldehyde releasing preservative (FRP). I used these wipes for the first 4 months and because we used them for so long without any problems it took me a long while to figure out what was causing his diaper rash. But apparently that's what happens with an FRP allergy, it isn't apparent at first, it appears and worsens after prolonged exposure. Other products that suddenly started giving us trouble were Johnson and Johnson's diaper rash cream and Lubriderm for sensitive skin, they both contain DMDM Hydantion. We switched to wiping with rags soaked in plain water and the rash cleared right up. Wish I had done that from the beginning, could've saved a few pennies.