[vharish]

Wouldn't changing the matress help? Also, if you using a pillow, consider keep them under the sun every few days. You can even keep the matress under the sun, maybe on the terrace if you have access to it. Pillows can also be washed as well.

Telling you from my own experience. It could work for you if you haven't tried already.

[grumpy-de-sre]

There's sweet FA sun for six months out of the year here in central europe so not a viable option.