Magnetic tape vs virtual walls for older Roombas: Virtual walls are cleaner, magnetic tape is cheaper

Virtual walls are the intended solution—those IR hockey pucks block doorways reliably and are cheap on eBay. Magnetic tape works on some 600/700 series models by tricking the [Roomba i](https://www.amazon.com/s?k=Roomba+i&tag=wehavethat-20)nto seeing a cliff, but it’s janky and model-dependent. If you have the puck, use it; if not, tape is a fine hack.