My 1 year old is starting to get cavities! *UPDATE*

Ever since my son has gotten his first two teeth in we’ve brushed his teeth tonight while brushing his teeth I noticed the start up of 3 cavities on three of his front teeth! I’ve been trying to get him dental insurance since he turned one but it’s taking forever! I call at least every other day just to sit on hold for 30 minutes and then to finally get through and then tell me the application is still being processed! Are there any home remedies I can use to help soothe any irritation or anything to help the cavities delay in getting bigger? TIA

*Update* yes he drinks juice. Specifically Motts Totts Apple Juice