I'm going to wash the pram/pushchair next week ready for dc3 but I don't want to land up wth a soapsudsy mess. I've thought of using clothes washing liquid (I've got ecovernonbio) but I'm worried that too much will soak in and I won't be able to rinse it out and then every time it rains it will suds up again! Would bicarb do the job? What would you use or is plain water enough?