This is my most recent emails with sprint customer care after I talked to a guy who was just a ass from sprint customer care 
Dear Lary ****erson,
Thank you for your reply
I am sorry to say that there is no other way to avoid the dust.
Thank you for emailing us.
Sincerely,
Kelsey K.
Sprint
Original Message Follows:
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That's great ...I already bought a cover and it has done nothing. It's
funny I have to buy a cover to keep dust from under a 500 dollar phone.
You guys sure do sell quality products. Again thanks for nothing.
On Feb 1, 2010 4:02 AM, "Sprint Customer Solutions
ecare1@cc.sprintpcs.com" <ecare1@cc.sprintpcs.com> wrote:
Dear Lary ****erson,
 Thank you for your reply.
 I apologize for the inconvenience caused due to accumulation of dust
 under the screen.
 There is no possible solution to avoid the dust. You need to visit the
 store to clean your handset. However, I suggest you to purchase a
 handset cover for your handset. This will help you in avoiding the
dust.
 Thank you for emailing us.
 Sincerely,
 Kelsey K.
 Sprint
 
 Original Message Follows:
 ------------------------
 AGAIN YOU GUYS ARE NO HELP WHAT SO EVER...IM ASKING IF YOU HAVE A
 SOLUTION FOR DUST UNDER THE SCREEN!!!!!!!!
 On Sun, Jan 31, 2010 at 1:46 PM, Sprint Customer Solutions
 
ecare1@cc.sprintpcs.com <ecare1@cc.sprintpcs.com> wrote:
 Dear Larry ****erson,
 Thank you for your reply.
 I understand your concern regarding the faulty handset and I apologize
 for the inconvenience you have gone through.
 As it is not possible to test your phone remotely, please visit a
Sprint
 Store so an on-site technician can conduct a diagnostic test to confirm
 the defect. You can find the nearest Sprint Store at
 
Sprint Store Locator.
 Further Total equipment Protection Programme (TEP) is also added on
your
 account. You can get a refurbished handset by calling Asurion at
 1-800-584-3666.  There is $100.00 charge for getting refurbished phone
 through Asurion.
 I can apply a credit of $50.00 against the phone replacement charge of
 Asurion.  Once you get the handset from Asurion, please write to us
with
 the scan image of receipts and we will apply the credit against the
 handset charge.
 We value your business and appreciate the opportunity to address your
 concerns. Please reply to this email or visit Sprint.com/mysprint if we
 can be of further assistance.
 Sincerely,
 Stela K.
 Sprint
 Original Message Follows:
 ------------------------
 I'm sure this is a auto response because u did nothing to
answer/resolve
 my issues at all. I'm becoming more and more disappointed with Sprint
 and your support.
 On Jan 31, 2010 7:18 AM, "Sprint Customer Solutions
 
ecare1@cc.sprintpcs.com" <ecare1@cc.sprintpcs.com> wrote:
 Dear Larry,
 Thank you for contacting Sprint regarding the Phone Issue.
 It is deeply disappointing to know that a valued customer had to file
a
 complaint. We pride ourselves in being focused on assisting customers.
 I am sorry that your experience with us has not been consistent. We
 assure you that your writing in to us will surely bring in a change.
 As it is not possible to test your phone remotely, please visit a
 Sprint
 Store so an on-site technician can conduct a diagnostic test to
 confirm
 the defect. I have made a note on your account records so that the
 store
 associate assisting you will have a point of reference. You can find
 the
 nearest Sprint Store at 
Sprint Store Locator.
 Thank you again for contacting Sprint. Please reply to this email or
 visit 
www.Sprint.com/mysprint if we can be of further assistance.
 Sincerely,
 Sandra
 Sprint
 Original Message Follows:
 ------------------------
========================================================================
 Original Question: dust under screen
 Question: I got a htc hero a few months ago and within a few days I
 noticed dust under the screen, I brought it in to the sprint store and
 they took it apart and cleaned it....a month later the dust was back
so
 I brought it back in and they attepted to clean it but this time they
 broke the home buttons at the bottom and had to order a refurb phone
 ...I recieved that one and a month later it too had dust under the
 screen. This time i called tech support to see if a fix has been found
 yet before I go back to the store. The guy at tech support said he
 couldnt find a fix in the computer and asked "what do you expect me to
 do about it." when I told him it keeps happening. He then told me that
 "I should just live with it because it isnt that big of a deal ",I
dont
 want to 'live with it' and that response and tone from your employee
 was
 very rude. I should not have to live with it or have to repeatally
 return to a sprint store and waste hours to have my phone cleaned out
 every month. please respond with a resolution to the hardware issue
 and
 you employees rude behavior