We had these little cute mice in our house a couple of years ago... Not ideal, nor hygienic, and they were awful to catch. Haven't had a problem for a while though -touch wood-.
And I say they were cute, they were, but they are terrifying.
Me and Cai were watching TV, and he goes 'there's a mouse by there'.... My lush, freshly made, HOT coffee ended up all over his lap, followed by a piercing scream and I was out of there.
HOPE the issue clears up and they leave you alone Kell! x