We moved into our house in July last year and there was evidence that mice were there: poison,droppings etc. We saw live mice shortly after so we paid a pest control expert over £70 who put bait down and monitored the situation. Thought he'd got rid of them. we blocked all entry routes into the house but we've started seeing them again over the last few weeks. We live in a semi rural area so I suppose it's just one of those things, but they're unhygenic and tbh I'm shit scared of the little buggers and desperate to be rid of them once and for all! House is covered in bait, traps out every night but nothing seems to be working. Any advice?? Do those plug in sound frequency things work? They're quite expensive so don't want to shell out for nothing (btw we are clean and sweep up crumbs regularly! )