i am cautious by nature, AND lived in a rental with WHITE CARPET when dd was tt-ing, so my "insurance" was to go, NAPPIES - CLOTH TRAINERS - UNDIES.

The cloth trainers had hidden waterproofing, and were pull up style, so dd regarded them as her knickers. I had a brolly sheet on the bed, so when she did wet overnight, the cloth trainer caught most of it, any overflow was caught by brollysheet, and i didn't even have to change sheets (just the brollysheet and fresh trainers).

She was in cloth trainers for about a month in total, and they were still in great condition, so no trouble selling them 2nd hand.