@Emerald_RVR alright we did some work to try to replicate what you have seen and try some very creative solutions.
First off, looks like you got it stuck on the back IR sensor. Things are a little easier with this. Remove your battery to make things a little easier. First try giving it a good shake or tap on the back to try to move the debris from out under the PCB. I promise it won’t hurt it. It is ok if it’s floating in the chassis elsewhere. If that doesn’t work, get your can of compressed air and try to get some air either in the back tabs (as shown with my lovely drawing), or through the battery compartment
I really will downvote opening up your RVR. I know it might seem like an easy task, but there was lots of care and love that went into building your robot, and that is difficult to replicate. I’m also pretty sure I’m legally supposed to tell you not to.
*sorry for the multicolored RVR, it’s all we had on hand!