My roomba got very wet and now it wont charge. it keeps saying error 1

@gordie4659 Error 1 should mean that no battery has been detected. Which makes sense after water damage. Treat it just like you would any other water-immersed device. For now, you want to stop continuing to try to charge, or use your Roomba.

The Next step would be to disassemble your Roomba. Use something like [iRobot Roomba e6 |this video]to help you disassemble your device. Take a careful and close look at all components and connectors. Truly assess the damage. Look for major corrosion, evaluate the pins in the connectors, etc,. Take a look at all connectors as well as cable ends. Once you get the gross contamination cleaned off with a brush or similar, use 90%+ isopropyl alcohol and clean your parts some more. For a proper cleaning, use this guide. It was written for an Apple iPhone 3G but it is still pertinent to your device as well. I can not stress the importance of a good cleaning enough, so do it over and over while replacing the alcohol after each cleaning. Do not use compressed air for the cleaning since that can drive liquid as well as corrosion particles into areas that will cause trouble later. Do not use drinking water, if you need to use water, use sterile water. Also, you do not need to leave it to dry for a day. Isopropyl alcohol in higher concentrations will evaporate quickly and dissipate the water. The importance here is the cleaning. It would, of course, be best to get it professionally cleaned. . After that, reassemble your phone and re-evaluate. Do not forget to replace the battery. This is a must and not an option. It will fail if you do not take care of it now. For as long as you have not cleaned your board and replaced the battery, everything is just a guess. Keep in mind that water damage is the hardest to troubleshoot and to repair. It does not matter if is was exposed for 2 seconds or 2 hours; what matters is where the water (particulates) did the damage.