Thermotherapy Against Persistent Bacterial LUNG Infections

Who May Qualify: - Age ≥ 18 years - Competent and capable - FEV1\>1,0 L - Have had a positive culture from sputum or BAL min. 2 times in the last 24 months for bacteria of the species: Pseudomonas aeruginosa, Stenotrophomonas maltophilia, Staphylococcus aureus, Haemophilus influenzae, Achromobacter xylosoxidans, Klebsiella oxytoca or Klebsiella pneumoniae. In addition, min. 1 positive culture after treatment with antibiotics - Willing to go to a sauna (min. temperature of 85℃ for at least 7 minutes) four times weekly for six months or avoid going to a sauna for six months Who Should NOT Join This Trial: - Allergy to lidocaine and/or midazolam - Contraindications to bronchoscopy - Previous severe laryngospasm (intubation requiring) - Pregnancy/breastfeeding - Severe linguistic problems or inability to give willing to sign a consent form - Severe mental illness that is not controlled with medication. NB: Patients with controlled mental illness can be included and will be asked on an equal footing as others Always talk to your doctor about whether this trial is right for you.