It looks like the device they are using is the TPS61025, not the TPS61052?
As you may know, most failures with boost converters are layout related. They need to have a good layout, especially with this device.
In addition, they need to use the proper output capacitor configuration noted in the datahseet. This device needs ESR in the output cap and does not support ceramic caps.
I would recommend using a newer device, such as the TPS61200, if their power specs allow it. If they need only 70 mA output current, then either the TPS61260 or TPS61070 are much preferred, being lower current, smaller solutions.
