Multiple tech visits

I have been having picture issues since July (pixelization) and have had 4 different tech visits and each time a new tech arrives he has no idea what the last tech(s) did to try and solve the problem. May I suggest that all techs who go on multiple calls to the same address/account have a full history regarding the issue(s) and the attempted fixes  so the customer doesn't have to start from scratch  reviewing the history with the tech and  so that there is no duplication of effort on the part of the techs.

Seems so simple to me, but I've asked every tech if they knew my history and none did.