Unfortunately, my room at the Mosaic had bedbugs and I awoke with approximately 50 bites. I asked the employee what their policy was to deal with this infestation so that they could get rid of them.
She consulted someone by phone and declared they have no policy, but they could refund any future nights if I left. The most they could do was change the sheets but only the following day. I had been hoping they would consider it a big enough problem that they would fumigate to ensure that no future guests would be bitten.
I was deeply concerned about bringing bedbugs to my next hotel so I decided to stay the next night (mistake!) and they allowed me to wash and dry my clothes for ONLY €15, how kind.
Of course, the second night, I doubled the number of swollen, itchy bites, and knew I could not stay. I did not ask for a refund of my third night so of course I had paid for three nights in exchange for about 100 bedbug bites.
One problem with bedbugs is that only a certain percentage of humans manifest a reaction to their bites, so probably plenty of people are carrying them from place to place and not realizing it. If I am the one who tells you your hotel has bedbugs, believe me! Eventually some other guest will get them too, so PLEASE have a policy for eradicating them before they spread.